v (transitive|now|_|rare) To perform, do (something) without authority; to lay claim to without permission. (defdate|from 14th c.)
v (transitive) With infinitive object: to be so presumptuous as (to do something) without proper authority or permission. (defdate|from 14th c.)
v (transitive) To assume to be true (without proof); to take for granted, to suppose. (defdate|from 14th c.)
v (intransitive) To be presumptuous; with (term|on), (term|upon), to take advantage (of), to take liberties (with). (defdate|from 15th c.)