Definition of wilco exclamation from the Oxford Advanced Learner's Dictionary

 

wilco

 exclamation
exclamation
BrE BrE//ˈwɪlkəʊ//
 
; NAmE NAmE//ˈwɪlkoʊ//
 
 
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people say Wilco! in communication by radio to show that they agree to do something Word Origin 1940s (originally in military use): abbreviation of will comply.
See the Oxford Advanced American Dictionary entry: wilco