[ bih-wair ]
See synonyms for beware on
verb (used with object)
  1. to be wary, cautious, or careful of (usually used imperatively): Beware such inconsistency. Beware his waspish wit.

verb (used without object)
  1. to be cautious or careful: Beware of the dog.

Origin of beware

1150–1200; Middle English, from phrase of warning be ware.See be, ware2

Words Nearby beware Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use beware in a sentence

British Dictionary definitions for beware


/ (bɪˈwɛə) /

  1. (usually used in the imperative or infinitive, often foll by of) to be cautious or wary (of); be on one's guard (against)

Origin of beware

C13 be war, from be (imperative) + war wary

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012