beau/boʊ/Pluralbeaus1a man romantically involved with someoneLetters between the two revealed the depth of affection she held for her longtime beau.Julia introduced her beau to her parents at the family dinner.Synonyms: swainboyfriendfellow2a man who is much concerned with his dress and appearanceSynonyms: fopgallantdandyfashion platedudesheikclotheshorseswell