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. (Science: anatomy) at or toward the caudal extremity; caudal; in human anatomy often used for dorsal.
4. (Science: botany) On the side next the axis of inflorescence; said of an axillary flower.
Origin: L. Posterior, compar. Of posterus coming after, from post after. See Post-.