Definition of beast
1a
: a four-footed mammal as distinguished from a human being, a lower vertebrate, and an invertebrate
b
: a lower animal as distinguished from a human being
c
: an animal as distinguished from a plant
d
: an animal under human control
2
: a contemptible person
3
: something formidably difficult to control or deal with
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Merriam-Webster unabridged
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Time Traveler for beast
The first known use of beast was in the 13th century
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