1. I am
   "I'm going to the store"

1. A message sent immediately to a person or group via the internet or text message
   "She sent him an IM to confirm the meeting time";
   - instant message

1. Send an instant message
   "He IMed his friend about the party";
   - instant-message

1. Not (il- is used before an l, im- before a b, m or p, ir- before an r)
   - in-, il-, ir-, un-
    
2. In, into, towards, within (il- is used before an l, im- before a b, m or p, ir- before an r)
   - in-, il-, ir-

Derived forms: IMed, IMs, IMing

Encyclopedia: I'm