besomPronunciation: /ˈbiːz(ə)m, ˈbɪz-/Definition of besom noun 1a broom made of twigs tied round a stick. 2Scottish & Northern English derogatory a woman or girl. Origin: Old English besema, of West Germanic origin; related to Dutch bezem and German Besenbesom in other Oxford dictionaries Definition of besom in the US English dictionary