third-par·ty | \ˈthərd-ˈpär-tē \

Definition of third-party 

(Entry 1 of 2)

1 : of, relating to, or involving a third party third-party insurance

2 : of, relating to, or being software that is created by a vendor to be compatible with the products of another vendor

third party


Definition of third party (Entry 2 of 2)

1 : a person other than the principals a third party to a divorce proceeding insurance against injury to third parties

2a : a major political party operating over a limited period of time in addition to two other major parties in a nation or state normally characterized by a two-party system

b : minor party

Examples of third-party in a Sentence

Recent Examples on the Web: Noun

These often include a blind trust, in which the owner does not know how the assets are managed by an independent third party. Luke Broadwater,, "As governor, Larry Hogan's real estate business continues to thrive — prompting questions," 13 July 2018 Having a third party as a mediator, such as a geriatric-care manager, is helpful in diffusing tense situations. Kelsey Mo, azcentral, "When and how to discuss senior-housing options with aging parents," 13 July 2018 Exit delays Ownership transfers to children (as opposed to an outside third party) usually require owners to wait longer before receiving full sale value. Tom Cooney And Crystal Faulkner,, "Careful planning essential when transferring business ownership to children," 11 July 2018 There's no need to bring third parties into stories that don't really involve them. Claire Dodson, Teen Vogue, "A "SelenaIsFreeParty" Hashtag Trended on Twitter After News Broke About Justin Bieber and Hailey Baldwin's Engagement," 9 July 2018 In Michigan, for example, a money transmission license is not required to operate Bitcoin ATMs if the financial transaction doesn't involve a third party. Susan Tompor, Detroit Free Press, "Bitcoin ATMs showing up in odd spots across metro Detroit," 28 June 2018 The external review will be conducted by an independent third party. Peter Dawson, star-telegram, "Texas A&M to review student disciplinary process after multiple sexual assault complaints," 16 June 2018 The CubeSat will be sending its exact location to a third party to the CBN accuracy. David Grossman, Popular Mechanics, "Harpoon-Based Space Junk Capture System Is Getting Space Tested," 25 June 2018 The court reasoned that the suspect had voluntarily turned over that information to a third party: the phone company. Adam Liptak, New York Times, "In Ruling on Cellphone Location Data, Supreme Court Makes Statement on Digital Privacy," 22 June 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'third-party.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of third-party


1901, in the meaning defined at sense 1


1641, in the meaning defined at sense 1

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The first known use of third-party was in 1641

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English Language Learners Definition of third-party

 (Entry 1 of 2)

law : of, relating to, or involving insurance that pays money to someone who is harmed by your actions

third party


English Language Learners Definition of third party (Entry 2 of 2)

law : someone who is not one of the two main people involved in a legal agreement but who is still affected by it in some way

third party

Legal Definition of third party 

see party sense 1a, b

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Comments on third-party

What made you want to look up third-party? Please tell us where you read or heard it (including the quote, if possible).


to reject or criticize sharply

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