An exclamation, uttered with a whistling sound, expressing astonishment or dismay.n. A whistling sound, usually noting astonishment.n. Same as whewer.To utter the interjection whew or a sound like it; whistle with a shrill pipe, as a plover or duck.To fly hastily: make great speed. Also whiew. Brockett; Halliwell.To hurry or bustle about; work tempestuously.n. A sudden vanishing away.