warning whistle

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• whistle */ — I UK [ˈwɪs(ə)l] / US / US [ˈhwɪs(ə)l] noun [countable] Word forms whistle : singular whistle plural whistles 1) a small metal or plastic object that you put in your mouth and blow to make a high sound blow a whistle: The referee blew the whistle… …   English dictionary

• whistle — whis|tle1 [ wısl, hwısl ] noun count * 1. ) a small metal or plastic object that you put in your mouth and blow to make a high sound: blow a whistle: The referee blew the whistle for half time. a ) a piece of equipment that produces a high sound …   Usage of the words and phrases in modern English

• Whistle — A simple whistle is a woodwind instrument which produces sound from a stream of forced air.Many types exist, from small police and sports whistles (also called pea whistles), to much larger train whistles, which are steam whistles specifically… …   Wikipedia

• whistle — Synonyms and related words: Angelus, Angelus bell, English horn, Klaxon, Mayday, Pandean pipe, SOS, air raid alarm, alarm, alarm bell, alarm clock, alarm signal, alarum, alert, all clear, anthem, assibilation, aulos, bagpipe, ballad, basset horn …   Moby Thesaurus

• Whistle post — A whistle post (or whistle board), in railroad usage, is a sign marking a location where a locomotive engineer is required to sound the horn or whistle.United StatesWhistle posts in the United States were traditionally placed about one quarter… …   Wikipedia

• Train whistle — A train whistle or air whistle, (originally referred to as a steam trumpet), is an audible signaling device on a steam locomotive used to warn that the train is approaching, and to communicate with rail workers.The older steam whistles were… …   Wikipedia

• Steam whistle — A steam whistle is a device used to produce sound with the aid of live steam. Unlike a horn, the sounding mechanism of a whistle contains no moving parts (compare to train horn).The whistle consists of the following main parts, as seen on the… …   Wikipedia

• police whistle — Synonyms and related words: Klaxon, Mayday, Roman candle, SOS, aid to navigation, air raid alarm, alarm, alarm bell, alarm clock, alarm signal, alarum, alert, all clear, amber light, balefire, beacon, beacon fire, bell, bell buoy, blinker,… …   Moby Thesaurus

• Automatic Warning System — The Automatic Warning System (AWS) is a form of limited cab signalling and train protection system introduced in 1956 in the United Kingdom to help train drivers observe and obey signals. It was based on a 1930 system developed by Alfred Ernest… …   Wikipedia

• Steam whistle — Steam Steam (st[=e]m), n. [OE. stem, steem, vapor, flame, AS. ste[ a]m vapor, smoke, odor; akin to D. stoom steam, perhaps originally, a pillar, or something rising like a pillar; cf. Gr. sty ein to erect, sty^los a pillar, and E. stand.] 1. The… …   The Collaborative International Dictionary of English

• boat whistle — noun a whistle on a boat that is sounded as a warning • Hypernyms: ↑whistle • Part Holonyms: ↑boat …   Useful english dictionary