Definition of "posterior"

(anatomy) Nearer the rear or hind end; nearer the caudal end of the body in quadrupeds or the dorsal end in bipeds.

1. (medicine) Relating to or denoting presentation of a fetus in which the rear or caudal end is nearest the cervix and emerges first at birth.  examples

2. (botany) Next to, or facing the main stem or axis.  examples

(formal) Following in order or in time.  examples

(euphemistic, humorous) The hinder parts of the body.  examples

(mathematics) The probability that a hypothesis is true (calculated by Bayes' theorem).  examples