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

The Internal Revenue Service generally requires investors to hold their interest in such funds for at least seven years.

From The Wall Street Journal • Jun. 9, 2026

Does she need to report this gift to the Internal Revenue Service?

From MarketWatch • Jun. 5, 2026

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 data on the four hundred highest-income taxpayers come from an Internal Revenue Service report, with 2004 tax rules applied to 2000 data.

From "Class Matters" by The New York Times