popcornPronunciation: /ˈpɒpkɔːn/Translate popcorn | into German | into Italian | into Spanish Definition of popcorn noun [mass noun] maize of a variety with hard kernels that swell up and burst open when heated: pop yourself some popcorn maize kernels when popped, typically eaten as a snack: a bag of popcornpopcorn in other Oxford dictionaries Definition of popcorn in the US English dictionary