partner

American  

[pahrt-ner] / ˈpɑrt nər /

noun

1. a person who shares or is associated with another in some action or endeavor; sharer; associate.

   Synonyms:

   accomplice, accessory, colleague

2. Law.

   1. a person associated with another or others as a principal or a contributor of capital in a business or a joint venture, usually sharing its risks and profits.

   2. special partner.

3. silent partner.

4. a spouse; a husband or a wife.

5. the person with whom one cohabits in a romantic relationship.

   I'd like you to meet my partner, Sarah.

6. either of two people who dance together.

   my favorite partner in the waltz.

7. a player on the same side or team as another.

   My tennis partner was an excellent player.

8. Nautical. partners, a framework of timber round a hole in a ship's deck, to support a mast, capstan, pump, etc.

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verb (used with object)

1. to associate as a partner or partners with.

2. to serve as the partner of.

partner British  

/ ˈpɑːtnə /

noun

1. an ally or companion

   a partner in crime

2. a member of a partnership

3. one of a pair of dancers or players on the same side in a game

   my bridge partner

4. either member of a couple in a relationship

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verb

1. to be or cause to be a partner (of)

Other Word Forms

• nonpartner
  noun
• partnerless
  adjective
• underpartner
  noun

Etymology

Origin of partner

First recorded in 1250–1300; Middle English partener, alteration of parcener by association with part

Explanation

If you open a lemonade stand with your brother, then your brother is your business partner. Partner means "to pair up." At a square dance, the call "partner up!" means it's time to find someone to dance with. In business, there are often multiple partners — each one owns a share of the business, and has a share of the risk. Some people call their spouse or the person they're in a long-term relationship with their partner — it has more egalitarian senses than "husband" or "wife," and signals commitment even if you're not married.

Example Sentences

WMG will work with its production partner, Unigram and Paramount to develop each project in conjunction with the artists or their estates.

From Los Angeles Times • May 8, 2026

Pena is leading a delegation of government officials and business representatives on a four-day visit, and has described the island as a "fundamental partner" for the South American country.

From Barron's • May 8, 2026

Barrie Drewitt-Barlow, a property developer, made headlines in 1999 when he and his partner at the time, Tony, became known as Britain's first gay fathers, having become parents through a surrogate mother.

From BBC • May 8, 2026

Fox’s fear of losing games created a highly unusual situation where Murdoch was seeking to stir up trouble for a partner it pays billions, fraying a relationship that has lasted for decades.

From The Wall Street Journal • May 8, 2026

That’s when I noticed that every other partner group was watching us, and my heart sank.

From "Glitch" by Laura Martin

Related Words

• ally
• associate
• colleague
• companion
• friend
• husband
• participant
• spouse
• wife