1. the hindmost part of something.
2. Informal.the buttocks; behind. Also called tail end.
Pronunciation: (rēr'end'),[key] —v.t. 1. to drive a vehicle or other conveyance so as to strike the back end of (another vehicle): My car was rear-ended by another driver on the highway. 2. (of a moving vehicle or other conveyance) to strike the back end of (another vehicle or object): A freight train rear-ended the commuter train this morning.