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

 

loco

 noun
noun
BrE BrE//ˈləʊkəʊ//
 
; NAmE NAmE//ˈloʊkoʊ//
 
 
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(pl. locos) (informal) = locomotive see also in loco parentis Word Originnoun mid 19th cent.: abbreviation.