IM Definition

īĕm
ims
verb
To send (someone) an instant message.
She IMed me to let me know that she would be late.
American Heritage
To express in an instant message.
He IMed me that he wanted to meet at noon.
American Heritage
noun
An instant message.
American Heritage
abbreviation
Instant message.
Webster's New World
Instant messaging.
Webster's New World
(astronomy) Irregular galaxy with no coherent structure.
Wiktionary

The ccTLD for Isle of Man as assigned by the IANA.

Wiktionary
affix
Imbibe.
Webster's New World
Immaterial.
Webster's New World
numeral
(informal) A Roman numeral representing nine hundred ninety-nine (999).
Wiktionary
pronoun

(colloquial) Representing a pronunciation of him that drops the h.

Wiktionary

Other Word Forms of IM

Noun

Singular:
IM
Plural:
IMS