Beware/bɪˈwer/ Definition 1 of 2Pro Tip 1/3Immediate Danger Use 'beware' when warning someone of an immediate, specific danger. Beware the icy steps outside. Pro Tip 2/3Strong Warning 'Beware' gives a sense of urgency to your warning. Beware the broken glass on the floor. Pro Tip 3/3Personal Safety Use it when someone's safety might be at risk. Beware of pickpockets in crowded areas.