Meanings
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1
intj
a sound used to show that someone is thinking, hesitating, doubtful, or mildly interested
Hmm, I need a little more time before I decide.
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2
intj
a sound used to ask for repetition, an explanation, or an answer
You said you left the door unlocked, hmm?
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3
verb
to make a thoughtful or hesitant humming sound
She hmmed over the proposal before signing it.
Thesaurus
Etymology
Imitative of a closed-mouth humming sound. Its spelling represents a vocal gesture rather than a word inherited from an older lexical root.