Number

1. , the Roman numeral representing nine hundred and ninety-nine (999).

See also

• Alternate forms: CMXCIX, cmxcix
• Previous: CMXCVIII (nine hundred and ninety-eight, 998)
• Next: M (one thousand, 1000)

1. (verb) to instant message, typically sent/received by cell phone, PDA, or computer.

   IM me when you get home.

2. (noun) an instant message

   I never got your IM last night.

3. (noun) idea management
4. (adjective) intramuscular