Meaning & use

thumb

noun, verb·Everyday

Last updated

UK/θʌm/
US/θʌm/

Meanings

  1. nouncountable

    The short, thick digit on the side of the hand that can touch each of the other fingers.

    Grammar: Countable: one thumb on each hand, two thumbs.

    Patterns

    • thumb and forefinger
    • the thumb of a glove

    She hit her thumb with the hammer and yelped.

    He pressed the button with his thumb.

    Babies sometimes suck their thumb for comfort.

  2. verbtransitive or intransitiveinformal

    To signal to passing drivers that you want a lift by holding out your thumb.

    Grammar: Often thumb a ride or thumb a lift.

    Patterns

    • thumb a ride
    • thumb a lift

    They thumbed a ride to the coast.

    He stood by the road, thumbing for a lift.

    We thumbed a lift with a farmer in a truck.

  3. verbtransitive

    To turn pages quickly with the thumb, reading only a little.

    Grammar: Usually thumb through something: thumb through a magazine.

    Patterns

    • thumb through something

    She thumbed through the catalog while waiting.

    He thumbed through the book to find the chart.

Word forms

pluralthumbs
third person singularthumbs
past tensethumbed
past participlethumbed
-ing formthumbing

Common combinations

thumbs up
The manager gave a thumbs up to the plan.
rule of thumb
As a rule of thumb, add a pinch of salt per cup.
under someone's thumb
He kept his staff under his thumb.
stick out like a sore thumb
In a suit, he stuck out like a sore thumb at the beach party.
thumb through
She thumbed through the old photos.
all thumbs
I am all thumbs when I try to sew.

Synonyms and how they differ

digit
Digit is a formal word for any finger or toe, but thumb names one specific finger.
flick through
Flick through means to turn pages quickly and suits thumb through, though it is more British.
hitchhike
Hitchhike is the plain verb for traveling by getting free rides, whereas thumb a ride describes the signal.

Word family

thumbnail noun
the nail of the thumb, or a small picture
thumbprint noun
the mark left by a thumb
thumbscrew noun
an old torture device or a screw turned by thumb
thumbs-up noun
a sign of approval

Commonly confused: thumb or thump?

thumb vs thump

Thump means to hit with a dull sound and is a different word; the b in thumb is silent.

Practice

He had to ___ a ride because his car broke down on a quiet road.

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