(1):
(a.) Situated behind; hinder; - opposed to anterior.
(2):
(a.) Later in time; hence, later in the order of proceeding or moving; coming after; - opposed to prior.
(3):
(a.) At or toward the caudal extremity; caudal; - in human anatomy often used for dorsal.
(4):
(a.) On the side next the axis of inflorescence; - said of an axillary flower.