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bull

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The definition of a bull is an uncastrated male bovine animal, or is slang for nonsensical and untrue talk.

(noun)

An example of a bull is a male ox.
An example of bull is talk that is made up of meaningless lies.

See bull in Webster's New World College Dictionary

noun

the adult male of any bovine animal, as the ox, buffalo, etc.
the adult male of certain other large animals, as the elephant, elk, moose, walrus, whale, etc.
a person who buys stocks or securities in the expectation that their prices will rise, or who seeks to bring about such a rise, in order to sell them at a profit
a person regarded as like a bull in size, strength, etc.
a bulldog
☆ Slang a policeman or detective
☆ Slang bullshit

Origin: ME bole < OE bula, a steer; akin to ON boli, Ger bulle < IE base *bhel-: see ball

transitive verb

☆ to make (one's way) with driving force
☆ Slang to bluff, as with insincere talk

intransitive verb

Slang to talk foolishly, insincerely, etc.

adjective

male
like a bull in size, strength, etc.
rising in price: a bull market

noun

bulla (sense )
an official document, edict, or decree, esp. one from the pope

Origin: ME & OFr bulle < LL bulla, a seal < L, anything round, knob, bubble: for IE base see big

noun

a ludicrously illogical or incongruous mistake in statement (Ex.: I'm glad I hate onions because if I liked onions, I'd eat them, and I can't stand onions)

Origin: < ? ME bul, trickery, lie

bulletin

of a bull or bulls: bullfight
like a bull or bull's: bullhead
large or male: bullfrog

Origin: < bull

See bull in American Heritage Dictionary 4

noun

a. An adult male bovine mammal.
b. The uncastrated adult male of domestic cattle.
c. The male of certain other large animals, such as the alligator, elephant, or moose.
An exceptionally large, strong, and aggressive person.
a. An optimist, especially regarding business conditions.
b. A person who buys commodities or securities in anticipation of a rise in prices or who tries by speculative purchases to effect such a rise.
Slang A police officer or detective.
Slang
a. Foolish, deceitful, or boastful language.
b. Insolent talk or behavior.