Entry 1 sense Webster, 1913 Knickerbockers /nĭkʹər-bŏk-ərz/ · Knick·er·bock·ers · IPA /ˈnɪkɚbɑkɚz/ 01 n. pl. The name for a style of short breeches; smallclothes; called also knickers. 1. The name for a style of short breeches; smallclothes; called also knickers. Also: knickers