Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

  

English definition of “IRS”

IRS

noun [U]
abbreviation for Internal Revenue Service (= the part of the US Treasury Department that collects most taxes owed to the federal government, including income tax)
(Definition of IRS noun from the Cambridge Academic Content Dictionary © Cambridge University Press)

Word of the Day

sail

When a boat or a ship sails, it travels on the water.

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More