1rear 
/ˈriɚ/ noun
plural rears /ˈriɚ/ noun 1 [noncount] : the part of something that is opposite to or away from the front part : the back part of something
▪ There are two bedrooms at the rear. — often + of ▪ The store is in the rear of the building. ▪ We sat toward the rear of the train/boat. 2 [count] informal : the part of your body that you sit on : buttocks — usually singular ▪ He slipped and fell on his rear. [=rear end]
▪ There are two bedrooms at the rear. — often + of ▪ The store is in the rear of the building. ▪ We sat toward the rear of the train/boat.
bring up the rear
: to be in the last position in a group, line, etc.
▪ At this point in the voting, Jones is leading with Smith in second place and Johnson bringing up the rear. ▪ They entered the room first and I brought up the rear.
▪ At this point in the voting, Jones is leading with Smith in second place and Johnson bringing up the rear. ▪ They entered the room first and I brought up the rear.
