noun
( NAmE ) a piece of material that floats well, or a jacket made of such material, used to rescue a person who has fallen into water, by keeping them above water
noun
( NAmE ) a piece of material that floats well, or a jacket made of such material, used to rescue a person who has fallen into water, by keeping them above water
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005