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an act or the process of articulating:
the articulation of a form; the articulation of a new thought.
Phonetics.

the act or process of speech.
the adjustments and movements of speech organs involved in pronouncing a particular sound, taken as a whole.
any one of these adjustments and movements.
any speech sound, especially a consonant.

the act of jointing.
a jointed state or formation; a joint.
Botany.

a joint or place between two parts where separation may take place spontaneously, as at the point of attachment of a leaf.
a node in a stem, or the space between two nodes.

Anatomy, Zoology. a joint, as the joining or juncture of bones or of the movable segments of an arthropod.
Dentistry.

the positioning of teeth in a denture, usually on an articulator, for correct occlusion.
the bringing of opposing tooth surfaces into contact with each other.
the relations of the upper and lower natural or artificial teeth in occlusion.

a measure of the effectiveness of a telephonic transmission system in reproducing speech comprehensibly, expressed as the percentage of speech units uttered that is correctly understood.
Contemporary Examples

ALEC: The writing is so smart and well crafted that articulation is critical.
Alec Baldwin & Robert Carlock On How They Made ’30 Rock’ So Funny Alec Baldwin, Robert Carlock January 31, 2013

It’s not like Kanye brought the articulation either when he apologized on his website.
Leave Kanye Alone Choire Sicha September 13, 2009

Historical Examples

His articulation now became difficult; but he was distinctly heard to say: “Thank God, I have done my duty!”
Fifty-two Stories of the British Navy, from Damme to Trafalgar. Alfred H. Miles

The selection and articulation of these men in all communities is all that is necessary.
The Ghost in the White House Gerald Stanley Lee

After this, she continued for some time in prayer, but her articulation was indistinct.
Mrs Whittelsey’s Magazine for Mothers and Daughters Various

Arthrodial: an articulation that permits motion in any direction.
Explanation of Terms Used in Entomology John. B. Smith

Therefore, music, the plastic arts and speech have their origin and their perfection in articulation.
Delsarte System of Oratory Various

Joint: a segment or part between two incisures: an articulation.
Explanation of Terms Used in Entomology John. B. Smith

His English was good, and his articulation indicated a quality of breeding.
The Frozen Pirate W. Clark Russell

It is simple, and well sung, with a distinctness of articulation not often heard.
Gryll Grange Thomas Love Peacock

noun
the act or process of speaking or expressing in words

the process of articulating a speech sound
the sound so produced, esp a consonant

the act or the state of being jointed together
the form or manner in which something is jointed
(zoology)

a joint such as that between bones or arthropod segments
the way in which jointed parts are connected

(botany) the part of a plant at which natural separation occurs, such as the joint between leaf and stem
a joint or jointing
n.

early 15c., “a joint or joining; setting of bones,” from Old French articulation, from Medieval Latin articulationem (nominative articulatio) “separation into joints,” noun of action from past participle stem of articulare “to separate (meat) into joints,” also “to utter distinctly,” from articulus, diminutive of artus “joint” (see article).

articulation ar·tic·u·la·tion (är-tĭk’yə-lā’shən)
n.

The place of anatomical union, usually movable, between two or more bones.

A joining or connecting together loosely so as to allow motion between the parts.

Distinct connected speech or enunciation.

The contact relationship of the occlusal surfaces of the teeth during jaw movement.

Placement of artificial teeth on a denture base so that the teeth approximate normal position and contact.

articulation
(är-tĭk’yə-lā’shən)

The arrangement of parts connected by joints.

A fixed or movable joint between bones.

A movable joint between inflexible parts of the body of an animal, as the divisions of an appendage in arthropods.

A joint between two separable parts, as a leaf and a stem.