A hum is a low, vibrating sound that's often hard to put into words. It's like the sound your stomach makes when it's growling with hunger.
When we use the word "hum" in everyday conversation, it usually means making this kind of sound. For example, if you have a car with a wonky engine, it might make a weird hum as it moves along the road. Or, if you're standing near an old house and there's a strange noise coming from inside, that could be just a creaky floorboard or perhaps a mysterious hum. Some electronic devices like computers or phones also tend to hum when they're working hard. We might use this word when we want to describe a gentle rumble or murmur that's often background noise in our lives.
How common is "hum"?
Word hum is considered uncommon in modern English. It appears most frequently in fiction texts and less often in other writings.
Definitions
interjection
Indicating thinking or pondering.
Example: Hmm... I just can't decide between the two.
A demand for an answer to a question.
Example: Just where were you until 2 a.m.? Hmm?
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noun
A hummed tune, i.e. created orally with lips closed.
An often indistinct sound resembling human humming.
Example: They could hear a hum coming from the kitchen, and found the dishwasher on.
Busy activity, like the buzz of a beehive.
Unpleasant odour.
An imposition or hoax; humbug.
A kind of strong drink.
A phenomenon, or collection of phenomena, involving widespread reports of a persistent and invasive low-frequency humming, rumbling, or droning noise not audible to all people.
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verb
To make a sound from the vocal chords without pronouncing any real words, with one's lips closed.
Example: We are humming happily along with the music.
To express by humming.
Example: The team ominously hummed “We shall overcome” as they came back onto the field after the break.
To drone like certain insects naturally do in motion, or sounding similarly
To buzz, be busily active like a beehive
Example: The streets were humming with activity.
To produce low sounds which blend continuously
To reek, smell bad.
Example: This room really hums — have you ever tried spring cleaning, mate?
To flatter by approving; to cajole; to deceive or impose upon; to humbug.
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interjection
An expression used to show contentment for something
Example: Mmm, this is a tasty pie!
An expression used to show thought or reflection
Example: Mmm, I see what you mean.
An expression used to show being muffled or not able to speak clearly, as well as "mmph".
Yes.
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interjection
Expression of hesitation, uncertainty or space filler in conversation. See uh.