assuming

American  

[uh-soo-ming] / əˈsu mɪŋ /

adjective

1. taking too much for granted; presumptuous.

---

assuming British  

/ əˈsjuːmɪŋ /

adjective

1. expecting too much; presumptuous; arrogant

---

conjunction

1. (often foll by that) if it is assumed or taken for granted (that)

   even assuming he understands the problem, he will never take any action

Other Word Forms

• assumingly adverb
• self-assuming adjective

Etymology

Origin of assuming

First recorded in 1595–1605; assume + -ing ²

Example Sentences

A small team would be needed to extract the uranium, assuming it could be found in a single location.

From Salon • Apr. 3, 2026

But investors should resist assuming a straight-line recovery.

From Barron's • Mar. 30, 2026

So whatever comes to you when your mother passes away — assuming she either does not make a will or makes one that includes her children — will include what remains of your grandmother’s estate.

From MarketWatch • Mar. 30, 2026

Pakistan is assuming a prominent role in mediating between the U.S. and Iran, offering to host peace talks and facilitating back-channel communications.

From The Wall Street Journal • Mar. 29, 2026

I felt so naïve for assuming I’d get the chance to work with Bright!

From "Flying Through Water" by Mamle Wolo