: the action or manner in which the parts come together at a joint <a sketch showing the articulation of the limbs>
a: a joint between bones or cartilages in the vertebrate skeleton that is immovable when the bones are directly united, slightly movable when they are united by an intervening substance, or more or less freely movable when the articular surfaces are covered with smooth cartilage and surrounded by a joint capsule—see amphiarthrosis, diarthrosis, synarthrosisb: a movable joint between rigid parts of any animal (as between the segments of an insect appendage)
a: the act or manner of articulating b: an articulated utterance or sound
a (1): the act of properly arranging artificial teeth (2): an arrangement of artificial teeth b:occlusion 2a
In phonetics, the shaping of the vocal tract (larynx, pharynx, and oral and nasal cavities) by positioning mobile organs (such as the tongue) relative to other parts that may be rigid (such as the hard palate) and thus modifying the airstream to produce speech sounds. Articulators include the tongue, lips, teeth and upper gum ridge, hard and soft palate, uvula, pharyngeal wall, and glottis. Primary articulation refers either to where or how the vocal tract is narrowed or blocked to produce a consonant, or to the tongue contour, lip shape, and larynx height that determine the sound of a vowel. Other articulators may be used to produce a secondary articulation such as palatalization (the front of the tongue approaching the hard palate), glottalization (complete or partial closure of the vocal cords), or nasalization (simultaneous passage of air through the nasal and oral tracts).