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 Ms Kramp-Karrenbauer was tripped up by a debacle in the east German state of Thuringia, where the CDU had voted with the far-right Alternative for Germany (AfD) to install a member of a third party as state premier. The Economist, "Trouble at the top Angela Merkel’s presumed successor quits as party boss," 13 Feb. 2020 Likud, like all Israeli political parties, was given a copy of the national voting registration for campaign purposes, pledging not to pass information to a third party and to purge the data after the election. Steve Hendrix, Washington Post, "Benjamin Netanyahu’s election app potentially exposed data for every Israeli voter," 10 Feb. 2020 But involving a third party in your transaction isn’t the savviest privacy move, Walsh says. Jessica Guynn, USA TODAY, "Want to take back your online privacy? 7 easy steps to stop Facebook and others from spying on you," 5 Feb. 2020 But one is left wondering whether her emphasis on the clash between capital and the people, with the legal profession as the crucial mediator, does justice to the third party in her story: the administrative state. Adam Tooze, The New York Review of Books, "How ‘Big Law’ Makes Big Money," 28 Jan. 2020 Sometimes, an objective third party with a fresh perspective such as Caring Transitions can help things flow smoother when sorting through belongings that can be sentimental to owners. Jennifer Rude Klett, Milwaukee Journal Sentinel, "Plan ahead when downsizing for a smoother, happier transition to your new home," 16 Jan. 2020 But the presence of a massive third party—such as a black hole—can muck things up, sending them spiraling toward each other in just a million years. Charlie Wood, Popular Science, "There’s a bizarre group of shapeshifting objects at the center of the Milky Way," 16 Jan. 2020 Fotis’ girlfriend, Michelle Troconis, was the third party to be charged in the Dulos case. Mekita Rivas,, "Jennifer Dulos Went Missing Months Ago & Her Husband Was Just Charged For Her Murder," 9 Jan. 2020 Popular ones include the personalized letter from Santa to your child, solicitations from unknown third parties that offer gift cards or discounts in exchange for taking a survey, and fake renewal requests for things like insurance coverage. cleveland, "9 popular holiday scams to watch out for this year," 23 Dec. 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.

See More

First Known Use of third-party


1901, in the meaning defined at sense 1


1641, in the meaning defined at sense 1

Keep scrolling for more

Learn More about third-party

Time Traveler for third-party

Time Traveler

The first known use of third-party was in 1641

See more words from the same year

Statistics for third-party

Cite this Entry

“Third-party.” Dictionary, Merriam-Webster, Accessed 25 Feb. 2020.

Keep scrolling for more

More Definitions for third-party


How to pronounce third party (audio)

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).


See Definitions and Examples »

Get Word of the Day daily email!

Test Your Vocabulary

More Confusing Words—Quiz

  • cats on impossible timber
  • The magician ______ moved the selected card to the top of the deck.
Spell It

Can you spell these 10 commonly misspelled words?

Bee Cubed

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!