a farm animal with short legs, a fat body, and a curved tail. Pigs are kept for their meat, which includes pork, bacon, and ham.——朗文当代大辞典

An omnivorous, domesticated even-toed ungulate derived from the wild boar Sus scrofa, with a stout body, sparse bristly hair, and a broad flat snout for rooting in the soil, kept as a source of bacon, ham, pork, etc. Also with distinguishing word to specify the breed.——牛津当代大辞典  @en