To usurp, as jurisdiction or royal prerogatives.
To encroach.
To hook, or draw to oneself as with a hook.
To be presumptuous; with on, upon, to take advantage (of), to take liberties (with).
To take as a premise; to assume for the sake of argument.
With infinitive object: to be so presumptuous as (to do something) without proper authority or permission.
To assume or suggest to be true (without proof); to take for granted, to suppose.