Simple Definition of BB

from our Learner's Dictionary

BB

noun

ˈbiːˌbiː How to pronounce BB (audio)
plural BBs
: a small metal ball that is fired from a BB gun

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“BB.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/BB. Accessed 23 Jun. 2026.

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