noun
pig; domestic pig
Refers to the animal, especially the domestic pig. The katakana form ブタ is also common in contexts such as animal names or labels.
祖父の農場では豚を十頭飼っている。
My grandfather's farm keeps ten pigs.
noun
Used to mean pork, especially in dish names, menus, and contrasts with other meats. 豚肉 is the more explicit word when you specifically mean the meat.
See also:
昼ご飯に豚のしょうが焼きを食べた。
I had ginger pork for lunch.
noun
Derogatory insult for a person, usually targeting body size. It is offensive and should not be used casually about people.
彼は太った同級生を豚と呼んで、先生に叱られた。
He called an overweight classmate a pig and was scolded by the teacher.
Rarely used kanji form; useful mainly for recognition or search, not normal modern writing.
More explicit and usually safer when you specifically mean pork as meat; 豚 can also mean pork in dish names or menu-style wording.
Means wild boar, not a domestic pig; the animals are related but the words are not interchangeable.
A direct casual insult meaning a fat person; like the derogatory use of 豚, it is offensive, but it does not also mean the animal.
The historical derivation of the reading ぶた is uncertain here. 豚 is the standard kanji spelling associated with the domestic pig, while 豕 is a rare kanji form related to pig or boar in kanji usage.