From Longman Dictionary of Contemporary Englishbow tiebow tie /ˌbəʊ ˈtaɪ $ ˈboʊ taɪ/ noun [countable] 
DCa short piece of cloth tied in the shape of a bow that men sometimes wear around their neck
DCa short piece of cloth tied in the shape of a bow that men sometimes wear around their neckExamples from the Corpus
bow tie• A fat man in a bow tie tapped the register.• That night, another of my presents was a bow tie.• I t was a collar and bow tie and the front of a shirt.• The referee patrols the bandaged ropes, dapper in his black bow tie.• She sat silently in her blue suit and little bow tie.• He was painted by Modigliani and Picarbia in a white shirt and tiny bow tie. 