To close a window (typically by clicking a button marked with an X symbol).
To cross out with a series of the letter X, or with scribbles or lines.
To escort someone on a date.
To immobilize with force; to subdue; to incapacitate.
To win a sporting event, competition, premiership, etc.
To obtain by application by a legal or other official process.
To remove.
To kill or destroy.