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 Twenty-six states allow voters to designate a third party to turn in their ballots, though 12 of those states limit how many ballots a person may collect, according to the National Conference of State Legislatures. John Fritze, USA TODAY, "Supreme Court's conservatives question effort to unwind voting laws that critics say discriminate," 3 Mar. 2021 If using a third party, most buyers look for bargain sales only, so the owner is unlikely to get a fair price. Jim Farmer, Forbes, "How To Lower Your Tax Bracket In Retirement (Part 2): Adding The Sale Of A Business," 2 Mar. 2021 For now, Trump appears to be stepping away from a threat to start a splinter third party. Philip Elliott, Time, "In His Return to Politics, Donald Trump Uses Lies and Bullying to Threaten His Party," 1 Mar. 2021 Rather than bringing in a third party to spearhead the consolidation, Ray, R-Clearfield, says agency members will lead that effort. The Salt Lake Tribune, "Plan to combine Utah health, human services agencies gains ground in Legislature," 25 Feb. 2021 The Republican Party could get a lot smaller if former President Donald Trump decides to create his own third party. Mike Brest, Washington Examiner, "Nearly half of Republicans would abandon party if Trump created a new one: Poll," 22 Feb. 2021 If Donald Trump formed a third party, among Trump voters, basically just about half, 46%, would support that Trump party. NBC News, "Meet the Press - February 21, 2021," 21 Feb. 2021 Law enforcement believed the package was hand-delivered by a third party or by the suspect. Kristen Griffith,, "Ohio man faces federal charges following October explosion that injured Carroll County man," 11 Mar. 2021 Thanks to remote-access technologies, more maintenance and monitoring activities were being performed off-site by a third party. Dave Weinstein, WSJ, "Hackers May Be Coming for Your City’s Water Supply," 26 Feb. 2021

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

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The first known use of third-party was in 1641

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Cite this Entry

“Third-party.” Dictionary, Merriam-Webster, Accessed 15 Apr. 2021.

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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

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