Bought is the past form of buy. It shows that someone gave money and received something in return in the past.
I bought a new book yesterday.
She bought some fruit at the store.
Bought can mean someone accepted or believed an idea because they received money or help. It is used when trust or support is gained in this way.
He bought her opinion with gifts.
The story was not bought by the audience.
In informal talk, bought means to agree or accept an offer or idea after discussion or payment.
They bought the deal quickly.
We bought his idea after some talk.
Though rare today, bought can be a noun meaning something that was bought or a purchase itself. This is mostly old or dialect use.
This bought is very valuable to me.
Her bought was expensive and rare.
Bought can describe property that has been paid for and legally owned, often used in formal or legal language.
The bought land belongs to the family.
She sold her bought house last year.