From Longman Dictionary of Contemporary Englishbullbull1 /bʊl/ ●●○ noun 1 
male cowHBATA [countable] an adult male animal of the cattle family a herd of cows with one bull2 male animalHBA [countable] the male of some other large animals such as the elephant or whale3 → take the bull by the horns4 nonsense [uncountable]UNTRUE informal nonsense or something that is completely untrue SYN rubbish What a load of bull!5 → like a bull in a china shop6 → like a bull at a gate7 religionRRC [countable] an official statement from the Pope8 centreDSO [countable] (also bullseye) the centre of a target that you are shooting at9 business [countable] technicalBFS someone who buys shares because they expect prices to rise → bear → bull market → cock and bull story at cock1(4), → like a red rag to a bull at red1(5), → shoot the bull at shoot1(13)
male cowHBATA [countable] an adult male animal of the cattle family a herd of cows with one bull2 male animalHBA [countable] the male of some other large animals such as the elephant or whale3 → take the bull by the horns4 nonsense [uncountable]UNTRUE informal nonsense or something that is completely untrue SYN rubbish What a load of bull!5 → like a bull in a china shop6 → like a bull at a gate7 religionRRC [countable] an official statement from the Pope8 centreDSO [countable] (also bullseye) the centre of a target that you are shooting at9 business [countable] technicalBFS someone who buys shares because they expect prices to rise → bear → bull market → cock and bull story at cock1(4), → like a red rag to a bull at red1(5), → shoot the bull at shoot1(13)Examples from the Corpus
bull• Myrcan sympathy, like milk from a bull.• I charged in like a bull.• With the right company, certainly the stock should hit new highs with the next bull market.• Put another way, if Karelin were in Pamplona, the bulls would run away from him. 6.• It didn't take Lowell long to realise that the bull hadn't unearthed any pieces of urn.• The bull was under the protection of a court order.bullbull2 interjection UNTRUEused to say that you do not believe or agree with what someone has said Bull! Where did you get that idea?Examples from the Corpus
bull• Bull! You could have come if you really wanted to.From Longman Business Dictionarybullbull /bʊl/ noun [countable]FINANCE1someone who thinks that prices of shares, bonds, currencies, etc are going to rise, and who will therefore keep and buy investmentsBulls predict the Dow Jones will go beyond 13,000.A growing group of dollar bulls (=people who think the price of the dollar is going to rise) has kept the dollar on a firm footing. → compare bear2a bull marketOrigin bull1 1. Old English bula2. (1900-2000) bullshit3. (1200-1300) Medieval Latin bulla bull2 (1900-2000) → BULL12 