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presume

/pɹɪˈzjuːm/ · pres·ume
verb
  1. 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.
  2. To perform, do something without authority; to lay claim to without permission. Don't make the decision yourself and presume too much.
  3. To assume or suggest to be true (without proof); to take for granted, to suppose. Dr. Livingstone, I presume?
noun
  1. A feeling of self-importance or overconfidence. His presumptions about the project's success were unwarranted.
Did you know? The phrase 'Dr. Livingstone, I presume?' was famously used by David Livingstone's friend, Henry Morton Stanley, when he met Livingstone in Africa in 1871.
Written by Lexi Wordsworth, Dictionary Editor 2 lookups Added Aug 2, 2026