English Reference

Word

mate

/ˈmeɪt/

Definitions

01a friend

A2

n. a friend or someone you spend time with.

n. a friend or close companion; frequently used as a familiar term of address.

“I'm going to the cinema with a few mates from work tonight.”

“He has been my best mate since primary school, and we still meet up every weekend to watch the football.”

British English · Informal · Dialect

Usage

Commonly used in British, Australian, and New Zealand English; less common in American English.

Synonyms

Antonyms

02ship's officer

B2 · nautical

n. an officer on a commercial ship who is below the captain.

n. a deck officer on a merchant ship, subordinate to the master or captain.

“The first mate was responsible for the ship's cargo and the crew's schedule.”

“After years of service as a second mate, he finally earned his certification to serve as a chief mate on international vessels.”

Technical

Synonyms

03breeding partner

B2 · Science

n. one of a pair of animals that produce babies together.

n. either member of a pair of animals that associate for the purpose of sexual reproduction.

“The male bird performs a complex dance to attract a mate.”

“In many avian species, individuals will travel thousands of miles to return to the same mate each nesting season.”

Synonyms

04matched pair

B2

n. the other half of a pair of things.

n. the corresponding member of a matched pair of objects.

“I found one blue sock, but I can't find its mate anywhere.”

“The collector spent years searching for the mate to the eighteenth-century porcelain vase he had inherited.”

Synonyms

05to breed

B2 · Science

v. when animals come together to have babies.

v. to pair for the purpose of reproduction; to copulate.

“Pandas in captivity sometimes find it difficult to mate naturally.”

“Biologists observed the wolves mating in the early spring, suggesting that the pack's population would increase by summer.”

Synonyms

breedcopulate

06to join or fit

C1 · Technical

v. to join two parts together so they fit perfectly.

v. to bring two parts or components into close physical contact or connection.

“Make sure the two electrical connectors mate properly before turning on the power.”

“The technician carefully aligned the satellite components to ensure they would mate securely during the final assembly phase.”

Technical

Synonyms

07herbal tea

B2 · Cooking

n. a traditional South American caffeine drink made from dried leaves.

n. an infusion made from the leaves of the yerba mate plant, traditional in South American cultures.

“They sat in the park sharing a hot cup of mate through a metal straw.”

“The consumption of mate is a significant social ritual in Argentina, Uruguay, and southern Brazil.”

Teaching tip

Often spelled with an accent (maté) to distinguish it from the English word for friend, though the accent is not strictly correct in Spanish.

Synonyms

Real-World Examples

“Twycross is home to the UK's only heard of Kordofan giraffes and staff hope a 10-month-old female will become the mother of the next generation, if a suitable mate can be imported.”
BBC News · 13 Aug 2026
“Thirteen years between them, Arteta and Bellerín were teammates then; real mates, too.”
The Guardian · 5 Aug 2026

Word family

Idioms

China — mate

Domain

Nautical

This entry

Level
B2 · Upper Intermediate
Frequency
Common
Updated

Scan code

englishreference.com/q/mate

English Reference