US EnglishUK EnglishInternationalneutralformal
- Located on the rear surface of something; placed against or attached to the backside of an object.
US EnglishUK EnglishInternationalneutralinformal
- Carried by or riding on the back of an animal or vehicle.
- Placed on top of or supported by another object for transport or display.
US EnglishUK EnglishInternationalinformalbusiness
- As a consequence of or following closely upon another event; due to the success or occurrence of something else.