Simple Definition of surmise

from our Learner's Dictionary

surmise

verb

sɚˈmaɪz

surmises; surmised; surmising

formal : to form an opinion about something without definitely knowing the truth : guess

We can only surmise what happened.

He must have surmised that I was not interested.

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“Surmise.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/surmise. Accessed 22 Jun. 2026.

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