(1):

(a.) Incapable of articulating.

(2):

(a.) Not uttered with articulation or intelligible distinctness, as speech or words.

(3):

(a.) Not jointed or articulated; having no distinct body segments; as, an inarticulate worm.

(4):

(a.) Without a hinge; - said of an order (Inarticulata or Ecardines) of brachiopods.