Definition of loony adjective from the Oxford Advanced Learner's Dictionary



BrE BrE//ˈluːni//
; NAmE NAmE//ˈluːni//
Describing strange traits
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(informal) crazy or strange He does have some pretty loony ideas. It seemed like another one of his loony projects. See related entries: Describing strange traits Word Originmid 19th cent.: abbreviation of lunatic.
See the Oxford Advanced American Dictionary entry: loony