Hypertext Webster Gateway: "whirr"
From WordNet (r) 1.7 (wn)
whirr
n : sound of something in rapid motion: "whir of a bird's
wings"; "the whir of the propellers" [syn: {whir}, {whirring},
{birr}]
v 1: make a soft swishing sound, as of a motor working or wings
flapping [syn: {whizz}, {whiz}, {whir}, {birr}, {purr}]
2: make a vibrant sound, as of some birds [syn: {churr}]
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