WordReference Random House Learner's Dictionary of American English © 2017
ˈthird ˈpar•ty, n. [countable]
any party to a case or quarrel only partly involved and not one of the primary disputants.
Government(in a two-party system) a usually temporary political party, often founded to promote a particular policy.
Computinga supplier of additional goods or support for a product or service who is neither the primary seller or supplier nor the purchaser.
WordReference Random House Unabridged Dictionary of American English © 2017 third′ par′ty,
- any party to an incident, case, quarrel, etc., who is incidentally involved.
- Government(in a two-party system) a political party formed as a dissenting or independent group from members of one or both of the two prevailing major parties.
Collins Concise English Dictionary © HarperCollins Publishers::
third party n
- a person who is involved by chance or only incidentally in a legal proceeding, agreement, or other transaction, esp one against whom a defendant claims indemnity
- providing protection against liability caused by accidental injury or death of other persons or damage to their property
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