thumb

Your thumb is the fifth digit on your hand, the one that doesn't quite match your fingers. Thumbs help us grip objects with care and precision — it would be difficult to hold chopsticks without a thumb.

Humans are more dextrous than our closest primate relatives because of our nimble thumbs. They're opposable, so we can move them forward and touch them to our fingers. Some monkeys share this trait, and they're the best able to use primitive tools. Your thumbs make it possible for you to brush your teeth, write with a pen, and snap. You can also thumb through the pages of a book — in other words, turn each page with your thumb.

Primary Meanings of thumb

1.
nv
the thick short innermost digit of the forelimb
look through a book or other written material
2.
n
a convex molding having a cross section in the form of a quarter of a circle or of an ellipse
Full Definitions of thumb
1

n the thick short innermost digit of the forelimb

Synonyms:
pollex
Type of:
finger
any of the terminal members of the hand (sometimes excepting the thumb)

n the part of a glove that provides a covering for the thumb

Type of:
covering
an artifact that covers something else (usually to protect or shelter or conceal it)

v look through a book or other written material

“He thumbed through the report”
Synonyms:
flick, flip, leaf, riff, riffle
Type of:
peruse
examine or consider with attention and in detail

v feel or handle with the fingers

Synonyms:
finger
Type of:
touch
make physical contact with, come in contact with

v travel by getting free rides from motorists

Synonyms:
hitch, hitchhike
Type of:
ride
be carried or travel on or in a vehicle
2

n a convex molding having a cross section in the form of a quarter of a circle or of an ellipse

Synonyms:
ovolo, quarter round
Types:
echinus
ovolo molding between the shaft and the abacus of a Doric column
Type of:
molding, moulding
a decorative strip used for ornamentation or finishing

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