Meaning & use
nm
Nanometer, a unit of length equal to one billionth of a meter, used to measure very small distances.
See it in a sentence
Visible light has wavelengths that range from about 380 to 750 nm.
The new microchip's transistors are fabricated at just a few nm in size.
A note on using this word
Common in physics, chemistry, and technology; in casual texting, lowercase "nm" is also used informally to mean "not much."
Words with a similar meaning
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Another way to use it
2. abbreviation
Informal texting shorthand for "not much," used to answer a casual greeting.
"What's up?" "Nm, just watching TV."
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