beware /biˈwɛɚ/verb 1forms 4phrases 1 verb1 •to be careful about someone or something that may bring harmBehold, I send an Angel before thee[…]. Beware of him, and obey his voice. — 1611 formsbewared · bewore · bewaring · bewares Phrases with beware let the buyer bewareIt is the buyer’s responsibility to ensure the soundness of goods or services prior to their purchase.