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

“We all should be tokenmaxxing,” said Sonya Huang, a partner at Sequoia Capital.

From The Wall Street Journal • Apr. 14, 2026

“Working together helps our community and makes our roads better for everyone,” Andrew Stober, the strategic partner manager at Waze, said in the release.

From Los Angeles Times • Apr. 14, 2026

"Whether you're living with a partner, housemate, or family, your daily interactions -- from hugging, kissing and sharing food prep spaces -- may encourage the exchange of gut microbes," said Dr. Lee.

From Science Daily • Apr. 13, 2026

She came back about two years ago, opened the Angel Coffee House, and is living in her parents' house with her partner.

From BBC • Apr. 13, 2026

Juanita and the twins were my official damas, my female attendants, and each of us had been assigned a nice, handsome dancing partner, a chambelán.

From "Summer of the Mariposas" by Guadalupe García McCall

Related Words

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