Noun
1. the back of a military formation or procession;
"infantrymen were in the rear"2. the side of an object that is opposite its front;
"his room was toward the rear of the hotel"3. the part of something that is furthest from the normal viewer;
"he stood at the back of the stage""it was hidden in the rear of the store"4. the fleshy part of the human body that you sit on;
"he deserves a good kick in the butt""are you going to sit on your fanny and do nothing?"5. the side that goes last or is not normally seen;
"he wrote the date on the back of the photograph"