Definition of singlet noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ˈsɪŋɡlət//
; NAmE NAmE//ˈsɪŋɡlət//
(British English)
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a piece of clothing without sleeves, worn under or instead of a shirt; a similar piece of clothing worn by runners, etc. compare vest Word Originmid 18th cent. (originally denoting a man's short jacket): from single (because the garment was unlined) + -et, on the pattern of doublet.