1. Bull definition is - a male bovine; especially : an adult uncastrated male domestic bovine

2. (a) meat of uncastrated young male animals of less than two years of age (category A);

3. (a) meat of uncastrated male animals aged from 12 months to less than 24 months (category A);

4. Generally they can be divided into piglets, which are 1.5 to 3 months old; the fattening pigs, intended for pork and bacon, which are 4 months to one year old; and finally the older pigs, such as sows (female pigs) and boars (uncastrated male pigs).

5. Bullock (in British English), a castrated male bovine animal of any age; Bullock (in North America), a young bull (an uncastrated male bovine animal); Bullock (in Australia, India and New Zealand), an ox, an adult male bovine used for draught (usually but not always castrated); Places Canada