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the external covering or integument of an animal body, especially when soft and flexible.
such an integument stripped from the body of an animal, especially a small animal; pelt:
a beaver skin.
the tanned or treated pelt or hide of an animal, especially when used in apparel and accessories; leather (usually used in combination):
pigskin; calfskin.
any integumentary covering, casing, outer coating, or surface layer, as an investing membrane, the rind or peel of fruit, or a film on liquid:
a skin of thin ice; the aluminum skin of an airplane.
Jewelry.

the outermost layer of a pearl.
the outermost layer of a diamond as found: often different in color and refraction from the inner part of the stone.

Nautical.

the shell or ceiling of a hull.
the outer, exposed part of a furled sail.

Metallurgy. an outer layer of a metal piece having characteristics differing from those of the interior.
a container made of animal skin, used for holding liquids, especially wine.
Slang. condom.
skins, Slang. drums.
Slang. a swindler; cheat.
Slang. a skinflint.
Slang. a horse.
Slang. a dollar bill.
Rocketry. the outer surface of a missile or rocket.
to strip or deprive of skin; flay; peel; husk.
to remove or strip off (any covering, outer coating, surface layer, etc.).
to scrape or rub a small piece of skin from (one’s hand, leg, etc.), as in falling or sliding against something:
She skinned her knee.
to urge on, drive, or whip (a draft animal, as a mule or ox).
to climb or jump:
He skinned the rope to the top of the wall.
to cover with or as if with skin.
Slang. to strip of money or belongings; fleece, as in gambling.
Cards. to slide cards one at a time off the top of (the pack) in dealing.
Slang. to defeat completely:
skinned at the polls.
Slang. to castigate; reprimand:
skinned for his disobedience.
Slang. to slip off or depart hurriedly (often followed by out).

Slang. showing or featuring nude persons, often in a sexually explicit way:
a skin magazine.
presenting films, stage shows, exhibitions, etc., that feature nude persons, especially in a sexually explicit way:
a Times Square skin house.

by the skin of one’s teeth, Informal. by an extremely narrow margin; just barely; scarcely:
We made the last train by the skin of our teeth.
get under one’s skin, Slang.

to irritate; bother:
His laugh really gets under my skin.
to affect deeply; impress; penetrate:
That sort of music always gets under my skin.

have a thick skin, to be insensitive to criticism or rebuffs:
The complaint desk is a job for someone who has a thick skin.
have a thin skin, to be extremely sensitive to criticism or rebuffs; be easily offended:
Be careful what you say to me, I have a thin skin.
in / with a whole skin, without harm; unscathed; safely:
She escaped from the burning building with a whole skin.
no skin off one’s back / nose / teeth, Slang. of no interest or concern or involving no risk to one.
save one’s skin, Informal. to avoid harm, especially to escape death:
They betrayed their country to save their skins.
skin alive, Informal.

to reprimand; scold.
to subdue completely, especially in a cruel or ruthless manner:
The home team was skinned alive this afternoon.

under the skin, in essence; fundamentally; despite appearances or differences:
sisters under the skin.
(in most vertebrates) one of the hard bodies or processes usually attached in a row to each jaw, serving for the prehension and mastication of food, as weapons of attack or defense, etc., and in mammals typically composed chiefly of dentin surrounding a sensitive pulp and covered on the crown with enamel.
(in invertebrates) any of various similar or analogous processes occurring in the mouth or alimentary canal, or on a shell.
any projection resembling or suggesting a tooth.
one of the projections of a comb, rake, saw, etc.
Machinery.

any of the uniform projections on a gear or rack by which it drives, or is driven by, a gear, rack, or worm.
any of the uniform projections on a sprocket by which it drives or is driven by a chain.

Botany.

any small, toothlike marginal lobe.
one of the toothlike divisions of the peristome of mosses.

a sharp, distressing, or destructive attribute or agency.
taste, relish, or liking.
a surface, as on a grinding wheel or sharpening stone, slightly roughened so as to increase friction with another part.
a rough surface created on a paper made for charcoal drawing, watercolor, or the like, or on canvas for oil painting.
to furnish with teeth.
to cut teeth upon.
to interlock, as cogwheels.
by the skin of one’s teeth, barely:
He got away by the skin of his teeth.
cast / throw in someone’s teeth, to reproach someone for (an action):
History will ever throw this blunder in his teeth.
cut one’s teeth on, to do at the beginning of one’s education, career, etc., or in one’s youth:
The hunter boasted of having cut his teeth on tigers.
in the teeth of,

so as to face or confront; straight into or against:
in the teeth of the wind.
in defiance of; in opposition to:
She maintained her stand in the teeth of public opinion.

long in the tooth, old; elderly.
put teeth in / into, to establish or increase the effectiveness of:
to put teeth into the law.
set one’s teeth, to become resolute; prepare for difficulty:
He set his teeth and separated the combatants.
set / put one’s teeth on edge,

to induce an unpleasant sensation.
to repel; irritate:
The noise of the machines sets my teeth on edge.

show one’s teeth, to become hostile or threatening; exhibit anger:
Usually friendly, she suddenly began to show her teeth.
to the teeth, entirely; fully:
armed to the teeth; dressed to the teeth in furs.
noun

the tissue forming the outer covering of the vertebrate body: it consists of two layers (the dermis and epidermis), the outermost of which may be covered with hair, scales, feathers, etc. It is mainly protective and sensory in function
(as modifier): a skin disease See also dermis, epidermis related adjectives cutaneous dermatoid

a person’s complexion: a fair skin
any similar covering in a plant or lower animal
any coating or film, such as one that forms on the surface of a liquid
unsplit leather made from the outer covering of various mammals, reptiles, etc Compare hide2 (sense 1)
the outer covering of a fur-bearing animal, dressed and finished with the hair on
a container made from animal skin
the outer covering surface of a vessel, rocket, etc
a person’s skin regarded as his life: to save one’s skin
(often pl) (informal) (in jazz or pop use) a drum
(informal) short for skinhead
(slang) a cigarette paper used for rolling a cannabis cigarette
(Irish, slang) a person; sort: he’s a good old skin
by the skin of one’s teeth, by a narrow margin; only just
(informal) get under one’s skin, to irritate one
jump out of one’s skin, to be very startled
(informal) no skin off one’s nose, not a matter that affects one adversely
skin and bone, extremely thin
thick skin, an insensitive nature
thin skin, a sensitive nature
verb skins, skinning, skinned
(transitive) to remove the outer covering from (fruit, etc)
(transitive) to scrape a small piece of skin from (a part of oneself) in falling, etc: he skinned his knee
(often foll by over) to cover (something) with skin or a skinlike substance or (of something) to become covered in this way
(transitive) (slang) to strip of money; swindle
adjective
relating to or for the skin: skin cream
(slang, mainly US) involving or depicting nudity: skin magazines
noun (pl) teeth (tiːθ)
any of various bonelike structures set in the jaws of most vertebrates and modified, according to the species, for biting, tearing, or chewing related adjective dental
any of various similar structures in invertebrates, occurring in the mouth or alimentary canal
anything resembling a tooth in shape, prominence, or function: the tooth of a comb
any of the various small indentations occurring on the margin of a leaf, petal, etc
any one of a number of uniform projections on a gear, sprocket, rack, etc, by which drive is transmitted
taste or appetite (esp in the phrase sweet tooth)
long in the tooth, old or ageing: used originally of horses, because their gums recede with age
tooth and nail, with ferocity and force: we fought tooth and nail
verb (tuːð; tuːθ)
(transitive) to provide with a tooth or teeth
(intransitive) (of two gearwheels) to engage
n.
n.

Ful of fleissche Y was to fele, Now … Me is lefte But skyn & boon. [hymn, c.1430]

The usual Anglo-Saxon word is hide (n.1). Meaning “epidermis of a living animal or person” is attested from early 14c.; extended to fruits, vegetables, etc. late 14c. Jazz slang sense of “drum” is from 1927. Meaning “a skinhead” is from 1970. As an adjective, it formerly had a slang sense of “cheating” (1868); sense of “pornographic” is attested from 1968. Skin deep is first attested in this:

All the carnall beauty of my wife, Is but skin-deep. [Sir Thomas Overbury, “A Wife,” 1613; the poem was a main motive for his murder]

The skin of one’s teeth as the narrowest of margins is attested from 1550s in the Geneva Bible literal translation of the Hebrew text in Job xix:20. To get under (someone’s) skin “annoy” is from 1896. Skin-graft is from 1871. Skin merchant “recruiting officer” is from 1792.
v.
skin’less adj.
skin
(skĭn)
The outer covering of a vertebrate animal, consisting of two layers of cells, a thick inner layer (the dermis) and a thin outer layer (the epidermis). Structures such as hair, scales, or feathers are contained in the skin, as are fat cells, sweat glands, and sensory receptors. Skin provides a protective barrier against disease-causing microorganisms and against the sun’s ultraviolet rays. In warm-blooded animals, it aids in temperature regulation, as by insulating against the cold.
tooth
(tth)

Plural teeth (tēth)

skin alive
skin and bones
skin deep
skin of one’s teeth
skin off one’s nose