To have rightful possession of (property, goods or capital); "To possess by right; to have the right of property in; to have the legal right or rightful title to." (Ref 1)
To defeat or embarrass; to overwhelm.
To virtually or figuratively enslave.
To illicitly obtain "super-user" or "root" access into a computer system thereby having access to all of the user files on that system; pwn.
To admit to be true; concede, grant, allow, acknowledge, confess; not to deny; to admit to be true. (Ref 2)
To acknowledge or admit the possession or ownership of. (Ref 3)