ISR

I1S1R1

Initialism of Inuvialuit Settlement Region.

Less commonScrabble 3
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Meanings

proper noun
  1. abbreviationinitialismInitialism of Inuvialuit Settlement Region.
nounISR (countable and uncountable, plural ISRs)

plural ISRs

  1. abbreviationcountableinitialismcomputingInitialism of interrupt service routine.

    This function registers an interrupt service routine (ISR) with the kernel

  2. abbreviationinitialismuncountableespionageInitialism of intelligence, surveillance, reconnaissance (“spycraft”).
  3. USabbreviationcountableinitialismobsoleteuncountableInitialism of interstate route.

Rhymes & wordplay

Anagrams

sir
Cite this entry
APA

ISR. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/ISR

MLA

“ISR.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/ISR. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “ISR,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/ISR.

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