Meaning

• 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).

Meaning

• Confidently or arrogantly overstepping reasonable bounds.