Definition of wayback
: the area in the back of a van, station wagon, or SUV … the scant storage behind the third seat. The seatback folds, but the only way to open up the wayback is to remove the third seat entirely. — Michael Lamm
First Known Use of wayback
Seen and Heard
What made you want to look up wayback? Please tell us where you read or heard it (including the quote, if possible).