bull
1 Americannoun
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the male of a bovine animal, especially of the genus Bos, with sexual organs intact and capable of reproduction.
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the male of certain other mammals, as elephants and moose.
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a large, solidly built person.
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a person who believes that market prices, especially of stocks, will increase (opposed to bear).
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Astronomy, Astrology. Bull, the constellation or sign of Taurus.
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a bulldog.
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Slang. a police officer.
adjective
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male.
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of, relating to, or resembling a bull, as in strength.
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having to do with or marked by a continuous trend of rising prices, as of stocks.
a bull market.
verb (used with object)
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Stock Exchange. to attempt to raise the price of.
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to speculate in, in expectation of a rise in price.
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to force; shove.
to bull one's way through a crowd.
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Nautical. to ram (a buoy).
idioms
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take the bull by the horns, to attack a difficult or risky problem fearlessly.
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bull in a china shop,
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an awkward or clumsy person.
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an inconsiderate or tactless person.
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a troublemaker; dangerous person.
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noun
idioms
noun
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a bulla or seal.
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Roman Catholic Church. a formal papal document having a bulla attached.
noun
abbreviation
noun
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any male bovine animal, esp one that is sexually mature
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the uncastrated adult male of any breed of domestic cattle
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the male of various other animals including the elephant and whale
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a very large, strong, or aggressive person
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stock exchange
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a speculator who buys in anticipation of rising prices in order to make a profit on resale
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( as modifier ) Compare bear 1
a bull market
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short for bull's-eye bull's-eye
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slang short for bullshit
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short for bulldog bull terrier
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a clumsy person
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slang
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to pass time talking lightly
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to boast or exaggerate
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to face and tackle a difficulty without shirking
adjective
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male; masculine
a bull elephant
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large; strong
verb
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(tr) to raise or attempt to raise the price or prices of (a stock market or a security) by speculative buying
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(intr) (of a cow) to be on heat
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slang (intr) to talk lightly or foolishly
noun
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John . 1563–1628, English composer and organist
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See John Bull
noun
noun
noun
Other Word Forms
Etymology
Origin of bull1
First recorded in 1150–1200; Middle English bule, Old English bula; akin to Old Norse boli; Greek phallós “penis,” from a root meaning “to swell”; see bullock
Origin of bull2
First recorded in 1620–30; from Medieval Latin bulla “play, game, jest,” perhaps special use of Latin bulla “bubble”; now generally taken as a euphemistic shortening of bullshit
Origin of bull3
First recorded in 1250–1300; Middle English bull(e) “a (lead) seal affixed to a papal edict, papal edict; official sealed document,” from Medieval Latin bulla “seal, sealed document,” from Latin ; see origin at bulla
Explanation
A bull is a male cow. You can usually tell which animal in a pasture is a bull by its large size and horns. A male bovine — or cow — is a bull, and so is a male whale or elephant. Fittingly, the word bull is sometimes also used for a particularly bulky, muscular man. Another informal and slightly obscene meaning is "ridiculous," or "not true," as when you tell a lie and your brother rudely replies, "Bull!" This slang meaning has its roots in the Old French bole, "deception or trick."
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
That was the year Ferrari dropped the ball on strategy in Abu Dhabi and threw away the title, letting Red Bull and Vettel in to win their first title.
From BBC • May 19, 2026
Cardboard cutouts of photographers are stationed along the route during the Red Bull Soapbox Race in downtown Los Angeles.
From Los Angeles Times • May 17, 2026
“A stand-alone E15 bill could also struggle to secure the 60 votes needed for cloture,” said Jim Wiesemeyer of Ag Bull Trading in a note Thursday.
From The Wall Street Journal • May 15, 2026
Teenage forward Julian Hall made Major League Soccer history by becoming the youngest player to score a hat-trick in Red Bull New York's 3-2 win over Columbus Crew.
From BBC • May 14, 2026
Dunwing flew off to her nest back at the court of King Bull Sparra.
From "Redwall" by Brian Jacques
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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.