(intransitive) To go in the reverse direction. / (transitive) To support.

Before now; ago.

At or near the rear. / (predicative) Returned or restored to a previous place or condition. / Not current. / Situated away from the main or most frequented areas. / In arrears; overdue.

(not comparable) To or in a previous condition or place. / In a direction opposite to that in which someone or something is facing or normally pointing.

A large shallow vat; a cistern, tub, or trough, used by brewers, distillers, dyers, picklers, gluemakers, and others, for mixing or cooling wort, holding water, hot glue, etc. / A ferryboat.

The spine and associated tissues. / (slang, uncountable) Large and attractive buttocks. / (figuratively) The part of a piece of clothing which covers the back.

(idiomatic) On or for a round trip journey, literal or figurative.

(Canada, US) behind

(transitive) Alternative spelling of back onto

In the past time of.