- 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.Licensed from iStockPhoto
Origin: see ladybird
Used by arrangement with John Wiley & Sons, Inc.
Origin: Probably from its seven spots being considered a symbol of the seven sorrows of the Virgin Mary.