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

 

pinky

 noun
(also pinkie)noun
BrE BrE//ˈpɪŋki//
 
; NAmE NAmE//ˈpɪŋki//
 
(pl. pinkies)(North American English, Scottish English) Hands and nails
 
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the smallest finger of the hand a pinky ring (= worn on the smallest finger) synonym little finger See related entries: Hands and nails Word Origin early 19th cent.: partly from Dutch pink ‘the little finger’, reinforced by pink, the colour.