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1.

1. Motionless: without moving.

2. Incapable of motion: Unable to move or be moved.

He stood perfectly immobile for a few seconds.
by Jafje March 31, 2007
 
2.
A non-virgin. The opposite being 'mobile' (virgin), often used in awkward situations.
"So Patty, you're...immobile?"
"Yes, I'm sorry, but I couldn't wait for you forever!"
by Geena-ish January 30, 2006