pa sti ri ər
adjective
1. located behind or toward the back of something. (Cf. anterior.)
The pituitary gland consists of two lobes, a larger front lobe and a smaller posterior lobe.
This insect’s posterior legs are shorter than its medial and front legs.
2. coming after in time or order (sometimes fol. by to).
3. pertaining to the tail end of an animal or the dorsal side of a human.
noun
the hind end of the body in man; buttocks.
While you’re just sitting here on your posterior, the others are out working!