- The definition of a ladybug is a small, roundish-shaped flying insect with a brightly colored back covered in black spots.
An example of a ladybug is a small round red bug that feeds on aphids.
A ladybug on a leaf.
ladybug definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
any of a family (Coccinellidae) of small, roundish beetles with spotted backs, usually brightly colored: they feed chiefly on insect pests and their eggs
Origin: see ladybird
ladybug definition by American Heritage Dictionary
Any of numerous small, rounded, usually brightly colored beetles of the family Coccinellidae, often reddish with black spots and feeding primarily on insect pests, such as scale insects and aphids. Also called lady beetle, ladybird.
Origin: Probably from its seven spots being considered a symbol of the seven sorrows of the Virgin Mary.