megaflop1 Syllabification: (meg·a·flop)Pronunciation: /ˈmegəˌfläp/Definition of megaflop noun Computing a unit of computing speed equal to one million floating-point operations per second. Origin: 1970s: back-formation from megaflops (see mega-, -flop)megaflop in other Oxford dictionaries Definition of megaflop in the British & World English dictionary