a small brightly coloured bird that lives in warm countries and that can stay in one place in the air by beating its wings very fast, making a continuous low sound (= a humming sound) Topics Birdsc2蜂鳥(快速扇動翅膀,發出嗡嗡聲,能空中懸停) Word Originmid 17th cent.: so named because of the humming sound produced by the rapid vibration of the bird's wings.