Pos‐te″ri‐or (pŏs‐tē″rĭ‐ẽr), a. [L. posterior, compar. of posterus coming after, from post after. See Post-.] 1. Later in time; hence, later in the order of proceeding or moving; coming after; — opposed to prior.
Hesiod was posterior to Homer. Broome.
2. Situated behind; hinder; — opposed to anterior.
3. (Anat.) At or toward the caudal extremity; caudal; — in human anatomy often used for dorsal.
4. (Bot.) On the side next the axis of inflorescence; — said of an axillary flower. Gray.