OLD-MAN'S BEARD Meaning of OLD-MAN'S BEARD in English [old-man's beard] n (1742) 1: any of several clematises (esp. Clematis vitalba) having plumose styles 2: a greenish gray pendulous lichen (Usnea barbata) growing on trees Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012