boomerPronunciation: /ˈbuːmə/Definition of boomer noun informal 1something large or notable of its kind, in particular: Australian a large male kangaroo. a large wave. 2North Americanshort for baby boomer (see baby boom). 3US a nuclear submarine with ballistic missiles. Origin: early 19th century: probably from the verb boom1 + -er1boomer in other Oxford dictionaries Definition of boomer in the US English dictionary
