Ir

adj, noun

adj, noun ·Uncommon ·College level

Definitions

Noun
  1. 1
    Initialism of inertial reference. abbreviation, alt-of, countable, initialism, uncountable

    "The pilot checked the IR system before takeoff."

  2. 2
    a board of the British government that administers and collects major direct taxes wordnet
  3. 3
    Initialism of industrial relations. abbreviation, alt-of, countable, initialism, uncountable

    "She is studying IR as part of her business degree."

  4. 4
    a heavy brittle metallic element of the platinum group; used in alloys; occurs in natural alloys with platinum or osmium wordnet
  5. 5
    Initialism of investor relations. abbreviation, alt-of, countable, initialism, uncountable

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

Show 10 more definitions
  1. 6
    Initialism of information retrieval. abbreviation, alt-of, countable, initialism, uncountable

    "Search engines rely on advanced IR techniques."

  2. 7
    Initialism of intermediate representation. abbreviation, alt-of, countable, initialism, uncountable

    "The compiler translated the code into LLVM IR."

  3. 8
    Initialism of incident report. abbreviation, alt-of, countable, initialism, uncountable

    "The officer filed an IR after the accident."

  4. 9
    Initialism of immediate release. abbreviation, alt-of, countable, initialism, uncountable

    "The doctor prescribed an IR tablet for quick pain relief."

  5. 10
    Abbreviation of infrared. abbreviation, alt-of, countable, uncountable

    "The camera detects IR light beyond the visible spectrum."

  6. 11
    Initialism of infrared radiation. abbreviation, alt-of, countable, initialism, uncountable

    "Scientists measured levels of IR radiation."

  7. 12
    Initialism of international relations. abbreviation, alt-of, countable, initialism, uncountable

    "She is majoring in IR at university."

  8. 13
    Initialism of injured reserve. abbreviation, alt-of, countable, initialism, uncountable

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

  9. 14
    Initialism of indoor rowing. abbreviation, alt-of, countable, initialism, uncountable

    "He competes in IR events at the Paralympics."

  10. 15
    Initialism of interstate route. abbreviation, alt-of, countable, initialism, rare, uncountable

    "We drove on an IR through rural Ohio."

Adjective
  1. 1
    Initialism of interracial. abbreviation, alt-of, initialism, not-comparable

    "The site featured an IR category for interracial content."

Antonyms

All antonyms
XR

Example

More examples

"Iridium is an element with atomic number 77 and is represented by the symbol Ir. It is a member of the transition metals group."

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.