Good; fair: used especially in address: as, “beau sir,” See beausire, beaupere, etc.n. (bōz).n. One who is very neat and particular about his dress, and fond of ornaments and jewelry; a fop; a dandy: now most often said of a man of middle age or older: as, he is an old beau.n. A man who is suitor to or is attentive to a lady; a lover; a swain.n. Synonyms Dandy, Exquisite, etc. See coxcomb.To act the beau to; attend or escort (a lady).