Definitions

1. verb

to form an opinion or conclusion, especially on the basis of incomplete or uncertain information

“She tried to surmise the reason behind his sudden departure.”

2. noun

an opinion or conclusion formed on the basis of incomplete or uncertain information

“His surmise about the outcome of the game proved to be incorrect.”

3. noun

a guess or conjecture

“She based her decision on a surmise about the company’s future plans.”