1
- a clear, high-pitched sound made by forcing breath through a small hole between partly closed lips, or between one's teeth口哨声。
1.1
- a similar sound, especially one made by a bird, machine, or the wind（鸟的）啭鸣声; （机器、风等发出的）啸叫声。
1.2
- an instrument used to produce such a sound, especially for giving a signal口哨, 哨子。
2
- Brit. a suit〈英〉一套衣服; 一手同花色牌。
- ORIGIN: from rhyming slang whistle and flute.
1
- no obj. emit a clear, high-pitched sound by forcing breath through a small hole between one's lips or teeth吹口哨：
the audience cheered and whistled.
观众们又欢呼又吹口哨。
1.1
- express surprise, admiration, or derision by making such a sound吹口哨 （表示惊讶、羡慕、嘲弄等）：
Bob whistled. 'You look beautiful!' he said.
鲍勃吹了声口哨, 然后说道：“你真美！”。
1.2
- with obj. produce (a tune) in such a way用口哨吹出（曲调）。
1.3
- (especially of a bird or machine) produce a similar sound（鸟） 啭鸣; （机器等）发啸叫声：
the kettle began to whistle.
水壶开始发出鸣啸声。
1.4
- no obj., with adverbial produce such a sound by moving rapidly through the air or a narrow opening呼啸而行：
the wind was whistling down the chimney.
风呼呼地从烟囱灌进来。
1.5
- blow an instrument that makes such a sound, especially as a signal吹哨示意：
the referee did not whistle for a foul.
裁判没有吹哨判犯规。
1.6
- with obj.
whistle someone/thing up
summon something or someone by making such a sound吹口哨唤起（或示意）。
2
whistle for
wish for or expect (something) in vain得不到, 空指望, 徒然希望：you can go home and whistle for your wages.
你可以回家了, 别指望拿到工钱。
短语
blow the whistle on
- informal bring an illicit activity to an end by informing on the person responsible〈非正式〉通过告发当事人终止不合法活动。
(as) clean as a whistle
1
- extremely clean or clear洁净; 清清楚楚。
1.1
- informal free of incriminating evidence〈非正式〉没留下犯罪证据：
the cops raided the warehouse but the place was clean as a whistle.
警察搜查了那个仓库, 但那个地方没有留下任何犯罪线索。
whistle something down the wind
1
- let something go; abandon something放走, 听其自由; 放弃。
1.1
- archaic turn a trained hawk loose by casting it off with the wind〈古〉放飞（训练过的鹰）。
whistle in the dark
- pretend to be unafraid借吹口哨壮胆; 故作镇定。
whistle in the wind
- try unsuccessfully to influence something that cannot be changed徒然无功。
词源
Old English （h）wistlian (verb)， （h）wistle (noun)， of Germanic origin; imitative and related to Swedish vissla 'to whistle'.