English Reference

Word

bob

US/ˈbɑb/

UK/bˈɒb/

Definitions

01to move up and down

B1

v. to move quickly up and down, especially while floating on water.

v. to move with a short, jerky, or buoyant motion, typically vertically at or near the surface of a liquid.

“The small wooden boat started to bob on the waves as the storm approached.”

“The cork bobbed rhythmically in the wake of the passing freighter, eventually drifting toward the reeds at the river's edge.”

Synonyms

Antonyms

02to cut hair short

B2

v. to cut someone's hair into a short, level style.

v. to cut hair into a bob; to shorten or dock a tail or garment.

“She decided to bob her hair for the summer to stay cool.”

“The stylist suggested she bob her hair to chin length to better accentuate her jawline.”

Synonyms

Antonyms

03a hairstyle

B1

n. a short hairstyle where the hair is cut to the same length all around, usually near the chin.

n. a short haircut for women or children, typically cut straight around the head at about jaw-level.

“She looks very different now that she has a sleek blonde bob.”

“The classic bob remains a staple of salon portfolios due to its versatility and ease of maintenance.”

Synonyms

04a weight

C1 · Science

n. a small weight that hangs on the end of a string, like on a clock.

n. the weight at the end of a pendulum or plumb line.

“The brass bob at the bottom of the clock swung back and forth.”

“The physicist calculated the period of the pendulum by measuring the distance from the pivot to the centre of the bob.”

Technical

Synonyms

05money

C2

n. a small amount of money, or a shilling in old British money.

n. a shilling; in modern usage, an unspecified but small sum of money.

“That old bicycle isn't worth a bob, if you ask me.”

“He managed to earn a few bob doing odd jobs for the neighbours during the summer holidays.”

British English · Informal · Archaic

Usage

Usually used in the singular even when referring to multiple units of currency.

Teaching tip

Mostly heard in the UK; 'a few bob' is a common idiom for 'some money'.

Synonyms

Etymology

Probably from a medieval hypocorism of Rob.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

Word family

bobVerbbobcatNoun

Idioms

bits and bobs — A random assortment of things; small remaining pieces and items.

Bob's your uncle — No problem, the solution is simple, there you have it, it's that easy, you have what you want, all will be well: indicates a desirable conclusion has been reached with ease.

two bob — A trivially small value.

Domain

Physics

This entry

Level
A1 · Beginner
Frequency
Common
Updated

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English Reference