third-party

1 of 2

adjective

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

2 of 2

noun

1
: a person other than the principals
a third party to a divorce proceeding
insurance against injury to third parties
2
a
: 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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Adjective
Ever since Hogan blazed the trail with his success against Gawker, ordinary Americans have increasingly turned to third-party funders, who typically front the costs of a lawsuit in exchange for a share of any recovery, for help taking on billion-dollar corporations with armies of lawyers. George Harris, The Orlando Sentinel, 3 Apr. 2026 The president's order from July prohibits athletes from receiving pay-to-play payments from third-party sources. Ryan Morik, FOXNews.com, 3 Apr. 2026
Noun
Yet distillation has been controversial when used by third parties — particularly in adversary nations like China or Russia — to replicate proprietary work without authorization. Bloomberg, Mercury News, 7 Apr. 2026 While some of the uptick is due to greater sensitivity to errors, the reporting agencies claim credit repair companies and other third parties are clogging their portals. Dan Avery, CNBC, 6 Apr. 2026 See All Example Sentences for third-party

Word History

First Known Use

Adjective

1901, in the meaning defined at sense 1

Noun

1641, in the meaning defined at sense 1

Time Traveler
The first known use of third-party was in 1641

Browse Nearby Words

See all Nearby Words

Cite this Entry

“Third-party.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/third-party. Accessed 8 Apr. 2026.

Kids Definition

third party

noun
1
: a person other than the main participants
a third party to the legal proceedings
2
a
: a political party operating usually for a limited time in addition to the two major parties in a 2-party system

Legal Definition

third party

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