my; our; one's own
「我」 has other readings with different meanings.
I; me
obstinacy
我が国の伝統文化を大切に守りたい。
I want to protect the traditional culture of our country.
我が家には先祖伝来の掛け軸がある。
There is an old hanging scroll in my home.
選手たちは我が校の誇りであり希望だ。
The athletes are the pride of our school.