flying saucer
From Longman Dictionary of Contemporary EnglishRelated topics: Spaceflying saucerˌflying ˈsaucer noun [countable] TTSa large round spacecraft from somewhere else in space, that some people believe they have seen in the sky → UFOExamples from the Corpusflying saucer• He would not raise his eyes to the sky, though he knew there was a flying saucer from Tralfamadore up there.• His flying saucer, however, is made of glass fibre and runs on compressed air.• On this particular occasion however, it is a nifty little flying saucer.• If you stare at the flying saucer long enough it begins to vibrate.