Hmm Definition
həm: conventionalized pronun.
interjection
Webster's New World
A demand for an answer to a question.
Just where were you until 2 a.m.? ... Hmm?
Wiktionary
verb
(intransitive) To make a thoughtful humming noise.
Wiktionary
abbreviation
(computer science) Hidden Markov model.
Wiktionary
Origin of Hmm
-
See hum.
From Wiktionary
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