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noun
1.
any of various colors resembling the color of blood; the primary color at one extreme end of the visible spectrum, an effect of light with a wavelength between 610 and 780 nanometers.
2.
something red.
3.
(often initial capital letter) Older Slang: Usually Disparaging. a radical leftist in politics, especially a Communist.
4.
Informal. red light (def 1).
5.
Informal. red wine:
a glass of red.
6.
Also called red devil, red bird. Slang. a capsule of the drug secobarbital, usually red in color.
adjective, redder, reddest.
7.
of the color red.
8.
having distinctive areas or markings of red:
a red robin.
9.
of or indicating a state of financial loss or indebtedness:
the red column in the ledger.
10.
Older Slang: Usually Disparaging.

radically left politically.
(often initial capital letter) communist:
Red China.

11.
Older Use: Disparaging and Offensive. relating to, noting, or characteristic of North American Indian peoples.
Idioms
12.
in the red, operating at a loss or being in debt (opposed to in the black):
The newspaper strike put many businesses in the red.
13.
paint the town red. paint (def 16).
14.
see red, Informal. to become very angry; become enraged:
Snobs make her see red.
verb (used with object), red, redding.
1.
redd1 .
noun
1.
a male or female given name.
2.
a nickname typically given to someone with red hair.
verb
1.
Informal. are :
Oysters R in season.
1.
variant of re- before a vowel or h in some words:
redintegrate.
1.
a native English suffix, denoting condition, formerly used in the formation of nouns:
hatred; kindred.
noun
1.
Harold (“Red”; “the Galloping Ghost”) 1903–1991, U.S. football player.
verb (used with object), redd or redded, redding. Northern and Midland U.S.
1.
to put in order; tidy:
to redd a room for company.
2.
to clear:
to redd the way.
noun
1.
Arnold (“Red”) 1917–2006, U.S. basketball coach and manager.
2.
Berthold
[ber-tohlt] /ˈbɛr toʊlt/ (Show IPA), 1812–82, German novelist.
noun
1.
John, c1460–1529, English poet.
2.
Richard Bernard (“Red”) 1913–97, U.S. actor and comedian.
noun
1.
any of a group of colours, such as that of a ripe tomato or fresh blood, that lie at one end of the visible spectrum, next to orange, and are perceived by the eye when light in the approximate wavelength range 740–620 nanometres falls on the retina. Red is the complementary colour of cyan and forms a set of primary colours with blue and green related adjectives rubicund ruddy
2.
a pigment or dye of or producing these colours
3.
red cloth or clothing: dressed in red
4.
a red ball in snooker, billiards, etc
5.
(in roulette and other gambling games) one of two colours on which players may place even bets, the other being black
6.
(archery) Also called inner. a red ring on a target, between the blue and the gold, scoring seven points
7.
(informal) in the red, in debit; owing money
8.
(informal) see red, to become very angry
adjective redder, reddest
9.
of the colour red
10.
reddish in colour or having parts or marks that are reddish: red hair, red deer
11.
having the face temporarily suffused with blood, being a sign of anger, shame, etc
12.
(of the complexion) rosy; florid
13.
(of the eyes) bloodshot
14.
(of the hands) stained with blood, as after committing murder
15.
bloody or violent: red revolution
16.
(of wine) made from black grapes and coloured by their skins
17.
denoting the highest degree of urgency in an emergency; used by the police and the army and informally (esp in the phrase red alert)
18.
(US) relating to, supporting, or representing the Republican Party Compare blue (sense 24)
verb reds, redding, redded
19.
another word for redden
verb reds, redding, red, redded
1.
(transitive) a variant spelling of redd1
adjective
1.
Communist, Socialist, or Soviet
2.
radical, leftist, or revolutionary
noun
3.
a member or supporter of a Communist or Socialist Party or a national of a state having such a government, esp the former Soviet Union
4.
a radical, leftist, or revolutionary
noun
1.
(mainly Brit) a farm, esp a farmhouse or country house with its various outbuildings
2.
(history) an outlying farmhouse in which a religious establishment or feudal lord stored crops and tithes in kind
3.
(archaic) a granary or barn
noun (in the US)
1.
the Grange, an association of farmers that strongly influenced state legislatures in the late 19th century
2.
a lodge of this association
noun
1.
Frank (Helmuth). born 1931, British painter, born in Germany, noted esp for his use of impasto
noun (pl) r’s, R’s, Rs
1.
the 18th letter and 14th consonant of the modern English alphabet
2.
a speech sound represented by this letter, in English usually an alveolar semivowel, as in red
3.
See three Rs
symbol
1.
(chem) radical
2.
(currency)

rand
rupee

3.
Réaumur temperature (scale)
4.
(physics, electronics) resistance
5.
roentgen or röntgen
6.
(chess) rook
7.
Royal
8.
(chem) gas constant
9.
(in the US and Australia)

restricted exhibition (used to describe a category of film certified as unsuitable for viewing by anyone under the age of 18)
(as modifier): an R film

verb redds, redding, redd, redded
1.
(transitive) often foll by up. to bring order to; tidy (up)
noun
2.
the act or an instance of redding
noun
1.
a hollow in sand or gravel on a river bed, scooped out as a spawning place by salmon, trout, or other fish
noun
1.
John. ?1460–1529, English poet celebrated for his short rhyming lines using the rhythms of colloquial speech

r abbr.
racemic

R abbr.

radical (usually an alkyl or aryl group)

respiration

respiratory exchange ratio

or r roentgen

r
Abbreviation of radius
R
The symbol for resistance.
red
Red

(Or “REDL”) A language proposed by Intermetrics to meet the Ironman requirements which led to Ada.
[“On the RED Language Submitted to the DoD”, E.W. Dijkstra, SIGPLAN Notices 13(10):27 (Oct 1978)].
[“RED Language Reference Manual”, J. Nestor and M. van Deusen, Intermetrics 1979].
(1995-01-19)
r
1.
correlation coefficient
2.
radius
3.
resistance
R
1.
gas constant
2.
radical
3.
rain
4.
range
5.
Réaumur
6.
receiver
7.
registered trademark
8.
Republican
9.
response
10.
restricted (children under 17 must be accompanied by a parent or guardian)
11.
right
12.
roentgen
13.
rook
14.
run
see: three R’s