Simple Definition of NB

from our Learner's Dictionary

NB

abbreviation

variants also N.B.
please note
—used in writing to tell the reader that something is important
NB: applications will not be accepted after May 5.

Note: The abbreviation NB comes from the Latin phrase "nota bene," which means "mark well."

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“NB.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/NB. Accessed 21 Jun. 2026.

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