With infinitive object: to be so presumptuous as (to do something) without proper authority or permission.
I wouldn't presume to tell him how to do his job.
To perform, do (something) without authority; to lay claim to without permission.
Don't make the decision yourself and presume too much.
To assume or suggest to be true (without proof); to take for granted, to suppose.
Dr. Livingstone, I presume?
To be presumptuous; with on, upon, to take advantage (of), to take liberties (with).