third-par·​ty | \ ˈthərd-ˈpär-tē How to pronounce third-party (audio) \

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

Examples of third-party in a Sentence

Recent Examples on the Web: Noun

But Amazon isn't shy about opening it up to third parties. Jacob Krol, CNN Underscored, "10 super cool devices to connect with Amazon Alexa," 4 June 2019 Except, DC Solar didn’t usually lease the generators to third parties as described by the company, the filings say., "This California couple scammed Berkshire Hathaway out of millions, feds say," 4 June 2019 This included requiring the top credit-reporting companies to create a website for consumers to get free access to their credit information and easily opt out of having their data shared or sold to third parties. Yuka Hayashi, WSJ, "Equifax Is Back in Washington’s Crosshairs," 1 Jan. 2019 Samsung is moving quickly — much quicker than Apple, for instance — to build out what Bixby is capable of doing by granting deep access to third parties. Jacob Kastrenakes, The Verge, "Samsung opens Bixby to third-party apps and devices," 7 Nov. 2018 Under the new Medicaid Provider Reassignment Regulation, states will be unable to make Medicaid payments to third parties like health insurance providers or unions on behalf of an individual worker. Kim Kelly, Teen Vogue, "Home Care Workers are the Latest Vulnerable Group Under Attack by the Trump Administration," 10 May 2019 In other cases, like Holt v. Hobbs, when the Muslim wanted to grow a half-inch beard, there is no harm to third parties. Christopher Shea, Vox, "Why Jeff Sessions thinks Christians are under siege in America," 1 Aug. 2018 Because the caller's information was voluntarily transmitted to a third party - the telephone company - the caller had no reasonable expectation that the numbers called would remain private. Robert Barnes,, "Supreme Court rules that warrant is needed to access cell tower records," 22 June 2018 Shares held by VTB Bank will be voted by a third party. The Editorial Board, WSJ, "Schumer’s Russia Sanctions Gambit," 14 Jan. 2019

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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Time Traveler for third-party

The first known use of third-party was in 1641

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More Definitions for third-party



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

More from Merriam-Webster on third-party

Rhyming Dictionary: Words that rhyme with third-party

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 take the place or position of

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