1. the short thick finger on the side of the human hand

1. to turn pages quickly with the thumb
2. to request a ride by holding out the thumb
Usage: informal

Examples

• She cut her thumb while chopping vegetables.
• The baby sucked his thumb.
• He thumbed through the magazine quickly.
• She thumbed the pages of the old book.
• They decided to thumb a ride to the next town.
• The hitchhiker stood by the road thumbing for a lift.