- (archaic) In the rear; a distance behind. [First attested prior to 1150.]
- (archaic) Towards the back or rear; backwards. [First attested prior to 1150.]
- (nautical) Backward against the mast; said of the sails when pressed by the wind from the "wrong" (forward) side, or of a ship when its sails are set that way. [First attested in the late 17th century.]
- By surprise; startled; dumbfounded.
- (obsolete) An abacus.