Beware of the dog. Definition of beware verb in oxford advanced learners dictionary. Random house kernerman websters college dictionary, © 2010 k dictionaries ltd. Used on signs to warn…. See examples of beware used in a sentence. To be cautious or careful: Wordreference random house unabridged dictionary of american english © 2025 be•ware (bi wâr′), v. t. · beware (defective, ambitransitive) to use caution, pay attention to (used both with and without of). To be wary, cautious, or careful of (usually used imperatively): Used to warn someone to be very careful about something or someone: Meanings, translations, synonyms, pronunciations, examples, and grammar insights - all in one comprehensive guide. Beware his waspish wit. To be wary, cautious, or careful of (usually used imperatively). Beware is an imperative verb often used as a warning or cautionary advice to be alert and attentive to avoid impending danger, harm, deception, or unpleasant situations. You should use “be aware” when … Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. Discover everything about the word beware in english: It shows that there’s a real threat to somebody. How to use beware in a sentence. You should use “beware” when indicating danger about something (i. e. , “beware of the bears in these woods”). The meaning of beware is to be on ones guard.