partner

partner — noun

1. a person, group, or country that works closely with another one for a shared pur

1.nounB2
Definition

a person, group, or country that works closely with another one for a shared purpose.

Example

Japan remains a key trade partner for several island nations.

trade partner

The hospital found a local partner to run the mobile clinic.

Common collocations
  • trade partner
  • local partner
  • research partner
  • project partner
Synonyms
  • associate

    a broad word for someone connected with you in work or activity

  • ally

    often stresses support toward the same goal

  • collaborator

    focuses on doing work together on something specific

Antonyms
  • rival

    someone or something working against the same side instead of with it

Grammar Patterns

partner in a project

trade partner

local partner

Usage Note

Often modified by words such as trade, research, or local. This sense can refer to organizations or countries, not only individual people.

Common Mistakes

The bank is our partnership in this plan.
The bank is our partner in this plan.
Partnership is the relationship; partner is the person or organization.

2. a person who shares ownership of a business with one or more other people.

2.nounB2
Definition

a person who shares ownership of a business with one or more other people.

Example

Rosa became a partner in the law firm at forty.

partner in a firm

Two partners opened the bakery with money from their families.

Common collocations
  • business partner
  • senior partner
  • managing partner
  • partner in a firm
Synonyms
  • co-owner

    a close match that stresses shared ownership

  • joint owner

    plain and legal-sounding, with focus on owning together

  • principal

    used in some professional firms for a leading owner

Antonyms
  • employee

    someone who works for the business without owning it

Grammar Patterns

partner in a firm

senior partner

managing partner

Usage Note

Common in legal, accounting, consulting, and family-business contexts. It usually appears with in or of plus the business name.

Common Mistakes

She is my partner at the office' (when meaning co-worker).
She is my colleague at the office.' / ✅ 'She is my business partner.
This sense means shared ownership, not simply working together.

3. someone in your close love life, such as a husband, wife, or person you live wit

3.nounB1
Definition

someone in your close love life, such as a husband, wife, or person you live with.

Example

Nina brought her partner to the school concert on Friday.

bring your partner

The form asks whether your partner lives at the same address.

common in forms and official language

Common collocations
  • long-term partner
  • former partner
  • live with a partner
  • bring your partner
Synonyms
  • spouse

    used when the two people are legally married

  • companion

    broader and less clearly romantic

  • lover

    more strongly focused on the sexual or romantic side

Antonyms
  • ex-partner

    someone who was once in the relationship but is not now

Grammar Patterns

bring your partner

live with a partner

former partner

Usage Note

Gender-neutral and useful when marital status is unknown, private, or not the main point. Distinguish from sense 4, which is about the person who does an activity with you.

Common Mistakes

My partner and I are not married, so I cannot say partner.
My partner and I live together in Tainan.
Partner can describe a serious relationship even without marriage.

4. one of two people who do a game, sport, dance, or similar activity together.

4.nounA2
Definition

one of two people who do a game, sport, dance, or similar activity together.

Example

Ella asked Sofia to be her partner for the first dance.

partner for a dance

My tennis partner hurt his ankle during Saturday's match.

tennis partner

Common collocations
  • dance partner
  • tennis partner
  • doubles partner
  • partner for the game
Synonyms
  • teammate

    broader and can refer to a whole team, not only a pair

  • doubles partner

    specific to a two-person sports team

  • dance partner

    specific to dancing rather than games or sports in general

Antonyms
  • opponent

    the person or side playing against you

Grammar Patterns

partner for a dance

tennis partner

doubles partner

Usage Note

Often used with for when naming the activity, or before a sport noun such as tennis or dance. Distinguish from sense 1, which can describe a broader working relationship.

Common Mistakes

I played with my teammate partner.
I played with my partner.' / ✅ 'I played with my teammate.
Partner already gives the idea of the other person in the pair.

partner — verb

Word family

Synonym discussion

Sense: noun/3

For noun sense 3, partner is a flexible, gender-neutral word for the person in your close romantic relationship. Spouse is narrower because it normally means a husband or wife in a legal marriage. Companion can sound warmer or older-fashioned, but it is broader and may not clearly imply romance. Lover is more intimate and often stresses the sexual side of the relationship. Boyfriend and girlfriend are common for dating, but they can sound younger or less formal than partner, especially in official or workplace contexts. Compare: The invitation lets you bring your partner. Her spouse signed the hospital form. Mia introduced Ben as her boyfriend.

Etymology

FrenchEnglish

Partner is related to the idea of having a part or share in something. It came into English through French and first referred to someone who shared in an activity or business with another person. From that core idea, English later widened the word to personal relationships, sports pairs, and organizations working together.