Posterior \Pos*te"ri*or\ (p[o^]s*t[=e]"r[i^]*[~e]r), 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}. [1913 Webster] Hesiod was posterior to Homer. --Broome. [1913 Webster] 2. Situated behind; hinder; -- opposed to {anterior}. [1913 Webster] 3. (Anat.) At or toward the caudal extremity; caudal; -- in human anatomy often used for {dorsal}. [1913 Webster] 4. (Bot.) On the side next the axis of inflorescence; -- said of an axillary flower. --Gray. [1913 Webster]