English Reference

Word

brother

Phoneticsbroth·er, stress on the first syllable

US/ˈbɹəðɝ/

UK/bɹˈʌðɐ/

Definitions

01male sibling

A1 · Beginner Countable noun

n. a boy or man who has the same parents as you.

n. a male person in relation to other children of the same parents.

“My older brother helped me with my math homework last night.”

“Although they are twins, my brother and I have developed vastly different professional interests over the years.”

Synonyms

Antonyms

02religious member

B2 · Upper Intermediate Countable noun Religion Formal

n. a man who belongs to a religious group, like a monk.

n. a male member of a religious order who has not been ordained as a priest.

“The brothers at the monastery spend their mornings in quiet prayer.”

“Brother Thomas has dedicated his life to the service of the poor within the local parish community.”

Synonyms

03close friend or ally

B1 · Intermediate Countable noun Informal

n. a man who shares the same ideas, goals, or background as you.

n. a male comrade or associate linked by a common cause, ethnicity, or shared experience.

“We have been through a lot together; he is like a brother to me.”

“The soldiers viewed each other as brothers after enduring the hardships of the winter campaign together.”

Synonyms

Antonyms

04informal address

B2 · Upper Intermediate Countable noun Informal · Slang

n. a friendly way to talk to another man.

n. a familiar or colloquial form of address used between men, often implying solidarity.

“Hey brother, can you tell me the way to the train station?”

“Listen, brother, I appreciate the advice, but I need to make this decision on my own.”

Synonyms

05expressing annoyance

B2 · Upper Intermediate Informal · American English

interj. a word you say when you are annoyed or surprised.

interj. an exclamation used to express frustration, exasperation, or disbelief.

“Oh brother, I forgot my keys in the car again.”

“Oh brother, not another meeting about the office coffee machine.”

Synonyms

good griefman

Word family

NOUN

Brother(A1)

ADJECTIVE

Related words

This entry

Exam level
CambridgeCambridgeCambridge English QualificationsThe exam suite from Cambridge University Press & Assessment, from A1 Movers up to C2 Proficiency. The benchmark names double as CEFR labels.A1 MoversIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.2.0–3.0TOEFL iBTTOEFL iBTTest of English as a Foreign Language, Internet-Based TestETS's academic English test, the standard route for US university admissions. Scored 0–120, with a 1–6 scale since 2026.1–6 scale: 1.0–1.50–23TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.120–224
Frequency
Very common
Level
A1 · BeginnerOxford
Updated

QR code

englishreference.com/q/brother

English Reference