Word.ws English Dictionary

IRT

IRT is the initialism of Interborough Rapid Transit Company.

IRT is the initialism of in reference to or in regard to.

IRT is the initialism of item response theory.

IRT is the initialism of investigation and recovery team.

IRT is the initialism of independent review team.

Noun

IRT (countable and uncountable, plural IRTs)

  1. The subway lines, collectively, formerly run by the Interborough Rapid Transit Company.
    • A Soho sweetheart wants the man who injured her husband thrown in front of the IRT.1977 April 30, Steve Blevins, “A Sack-full of Films”, in Gay Community News, page 11
    • Take the IRT to Atlantic and change for the R.

Proper noun capitalized: Irt

Irt

  1. A river in Cumbria, England, which flows from Wast Water, and into the Irish Sea.

Synonyms of IRT

Forms of IRT

pluralIRTs

Origin of IRT

Abbreviation.

Questions about IRT

What does IRT mean?
IRT means the subway lines, collectively, formerly run by the Interborough Rapid Transit Company.
What is IRT the initialism of?
IRT is the initialism of Interborough Rapid Transit Company.
What part of speech is IRT?
IRT can be a noun or a proper noun.
What is the plural of IRT?
The plural of IRT is IRTs.

Words near IRT in the dictionary

  1. IRSF
  2. Irshava
  3. irsogladine
  4. IRSP
  5. IRSs
  6. IRT
  7. Irta'ale
  8. irtal
  9. Irthlingborough
  10. Irtysh
  11. irtyshite

Source and license

Adapted from Wiktionary: IRT (page history and authors); Irt (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

Last updated:

Cite this entry: “IRT.” Word.ws, https://word.ws/irt. Based on Wiktionary, CC BY-SA 4.0.