Definitions

1. adjective

located at the back or rear

“The posterior part of the building had a large garden.”

2. noun

the back or rear part of the body

“The doctor examined the patient’s posterior.”

3. noun

the back or rear part of an object

“The posterior of the car was dented.”

4. noun

anatomy, the posterior part of a bone or organ

“The doctor studied the posterior of the patient’s vertebrae.”