Internal Revenue Service

American  

noun

1. the division of the U.S. Department of the Treasury that collects internal revenue, including income taxes and excise taxes, and that enforces revenue laws. IRS

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Internal Revenue Service ¹ Cultural  

1. A federal agency, part of the Department of the Treasury, that collects most federal taxes, including income and Social Security taxes.

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Internal Revenue Service ² Cultural  

1. Part of the United States Department of the Treasury. The IRS is responsible for the collection of all federal taxes, except customs duties.

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Example Sentences

President Donald Trump’s $10 billion lawsuit against the Internal Revenue Service over a leaked tax-return scandal from six years ago was on the verge of an epic settlement.

From Slate • Jun. 4, 2026

But between 2018 and 2020, an Internal Revenue Service contractor leaked a large number of wealthy Americans’ tax returns to the media, and Trump’s was among them.

From Salon • May 25, 2026

The Internal Revenue Service does not treat trusts like individuals as far as taxes are concerned.

From MarketWatch • May 23, 2026

The fund was created as part of a settlement resolving a $10-billion lawsuit Trump personally brought against the Internal Revenue Service over the leak of his tax returns.

From Los Angeles Times • May 22, 2026

Some of them had green Registered Mail stickers on them and were from the Internal Revenue Service.

From "Liar, Liar" by Gary Paulsen