the world > action or operation > harm or detriment > danger > warning of imminent danger or evil > warning cry [interjection] > to warn of someone's approach (4)
‘Beware!’ ‘Look out!’ Also occasionally as a children's truce term.
Expressing caution, surprise, or impatience.
Beware! A signal of warning, e.g. of the approach of a master. Also used substantively in to keep cave.
Signalling or warning of a person's approach: ‘Beware!’, ‘Look out!’.