Definition of "beware" []

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

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "In my opinion, buyer beware is a relevant warning EVERY time I bust out my wallet."
• "When voting time comes around again beware of the Tsunami."
• "Caveat emptor [let the buyer beware] is the only motto going, and the worst proverb that ever came from dishonest stony-hearted Rome."