IR

I1R1

A form of inertial reference — Any of various devices found in airplanes, missiles, satellites, guns, etc. that sense and calculate data such as linear acceleration and turning rate around each axis and which send that data on to other systems.

Similar
Inland Revenueiridiumatomic number 77
Opposite
CommonScrabble 2

Meanings

nounIR (countable and uncountable, plural IRs)

plural IRs

  1. abbreviationcountableinitialismuncountableaeronauticsInitialism of inertial reference.

    The pilot checked the IR system before takeoff.

  2. abbreviationcountableinitialismuncountablebusinessInitialism of industrial relations.

    She is studying IR as part of her business degree.

  3. abbreviationcountableinitialismuncountablebusinessInitialism of investor relations.

    The company’s IR team held a quarterly earnings call.

  4. abbreviationcountableinitialismuncountablemachine learningInitialism of information retrieval.

    Search engines rely on advanced IR techniques.

  5. abbreviationcountableinitialismuncountablecomputingInitialism of intermediate representation.

    The compiler translated the code into LLVM IR.

  6. abbreviationcountableinitialismuncountablegovernmentInitialism of incident report.

    The officer filed an IR after the accident.

  7. abbreviationcountableinitialismuncountablemedicineInitialism of immediate release.

    The doctor prescribed an IR tablet for quick pain relief.

    Antonyms: XR

  8. abbreviationcountableuncountablenatural sciencesAbbreviation of infrared.

    The camera detects IR light beyond the visible spectrum.

  9. abbreviationcountableinitialismuncountablenatural sciencesInitialism of infrared radiation.

    IR blaster

    2 more examples

    Scientists measured levels of IR radiation.

    IR communication

  10. abbreviationcountableinitialismuncountablegovernmentInitialism of international relations.

    She is majoring in IR at university.

  11. abbreviationcountableinitialismuncountablehobbiesInitialism of injured reserve.

    The player was placed on IR for the remainder of the season.

  12. abbreviationcountableinitialismuncountabledisability sportInitialism of indoor rowing.

    He competes in IR events at the Paralympics.

  13. abbreviationcountableinitialismrareuncountableOhioInitialism of interstate route.

    We drove on an IR through rural Ohio.

adjectiveIR (not comparable)
  1. abbreviationinitialismnot comparableInitialism of interracial.

    The site featured an IR category for interracial content.

Synonyms & antonyms

More synonyms by meaning

nouna board of the British government that administers and collects major direct taxes

Broader
administrative unitadministrative body

nouna heavy brittle metallic element of the platinum group; used in alloys; occurs in natural alloys with platinum or osmium

Similar
iridiumatomic number 77
Broader
metallic elementmetal

Synonym sets from Open English WordNet, CC BY 4.0.

Cite this entry
APA

IR. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/IR

MLA

“IR.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/IR. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “IR,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/IR.

Source: IR on Wiktionary, CC BY-SA 4.0.