from The American Heritage® Dictionary of the English Language, 4th Edition

  • transitive v. To be on guard against; be cautious of: "Beware the ides of March” ( Shakespeare).
  • intransitive v. To be cautious; exert caution: We had to beware of the icy patches on the road. Beware of the dog.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • v. To use caution, pay attention (to) (if intransitive, construed with of).

from the GNU version of the Collaborative International Dictionary of English

  • intransitive v. To be on one's guard; to be cautious; to take care; -- commonly followed by of or lest before the thing that is to be avoided.
  • intransitive v. To have a special regard; to heed.
  • transitive v. To avoid; to take care of; to have a care for.

from The Century Dictionary and Cyclopedia

  • To be wary or cautious; be on one's guard; exercise care or vigilance: properly two words, be ware, consisting of the infinitive or imperative of be with the adjective ware: followed by of, expressed or understood, with the force of ‘against,’ ‘in regard to’: as, beware of evil associations; beware how you step; “beware the bear,”

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • v. be on one's guard; be cautious or wary about; be alert to


Middle English ben war : ben, to be; see be + war, on one's guard; see ware2.
(American Heritage® Dictionary of the English Language, Fourth Edition)
be- +‎ ware (Wiktionary)



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