Meanings
nounbusy beaver (plural busy beavers)
plural busy beavers
- informalSomeone who is very busy or hard-working.
Wow! Laundry, dishes, and errands, all in one day? You've been a busy beaver.
Synonyms: busy bee
- computingA Turing machine that attains the maximum number of steps performed, or number of non-blank symbols finally on the tape, among all Turing machines in a certain class.
Synonyms & antonyms
nounSomeone who is very busy or hard-working.
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Cite this entry
APA
busy beaver. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/busy%20beaver
MLA
“busy beaver.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/busy%20beaver. Accessed November 4, 2026.
Chicago
WatkinsX Dictionary, s.v. “busy beaver,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/busy%20beaver.
Source: busy beaver on Wiktionary, CC BY-SA 4.0.