Definition of molly
: any of several brightly colored tropical live-bearers (genus Poecilia) highly valued as aquarium fishes
Variants of molly
Origin of molly
by shortening from New Latin Mollienisia, former genus name, from Comte François North Mollien †1850 French statesman
First Known Use: circa 1933
Learn More about molly
Britannica.com: Encyclopedia article about "molly"
Seen and Heard
What made you want to look up molly? Please tell us where you read or heard it (including the quote, if possible).