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蜂鸟(快速扇动翅膀,发出嗡嗡声,能空中悬停) Word Originmid 17th cent.: so named because of the humming sound produced by the rapid vibration of the bird's wings.