Definition of M&M's™ noun from the Oxford Advanced Learner's Dictionary

 

M&M's™

 noun
noun
BrE
 
; NAmE
 
[plural]
 
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small round chocolate sweets, brightly coloured and sometimes with peanuts inside, that are covered with hard sugar to stop them melting in the hand. They were first sold in 1941, and are named after the two Americans who originally made them, Forrest Mars and Bruce Murries.