Ir

symbol

Definition of Ir

 (Entry 1 of 3)

iridium

Definition of IR (Entry 2 of 3)

1 information retrieval
2 infrared
3 British inland revenue
4 intelligence ratio
5 internal revenue

ir-

prefix

Definition of ir- (Entry 3 of 3)

— see in-

Keep scrolling for more

More Definitions for Ir

ir-

Kids Definition of ir-

see in-

Ir

symbol

Medical Definition of Ir

 (Entry 1 of 2)

iridium

Medical Definition of IR (Entry 2 of 2)

infrared

More from Merriam-Webster on Ir

Spanish Central: Translation of Ir

Nglish: Translation of Ir for Spanish Speakers

Comments on Ir

What made you want to look up Ir? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

to form ideas or theories about something

Get Word of the Day daily email!

Test Your Vocabulary

Farm Idioms Quiz

  • cow coming home
  • What does 'poke' refer to in the expression 'pig in a poke'?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!