1A conjunction used to add another item or point to what was just said — similar to それに/そして ('and also', 'in addition'). Common in both conversation and writing. Usually written in kana.
ご飯と味噌汁、それと漬物で十分です。
Rice, miso soup, and pickles — that's enough.
それと、明日の会議の資料を忘れずに持ってきてください。
Also, please don't forget to bring the materials for tomorrow's meeting.
彼の案には賛成だ。それと、予算の見直しも必要だと思う。
I agree with his proposal. Also, I think the budget needs to be reviewed.
牛乳を買ってきて。それとパンも忘れないでね。
Please buy some milk. Oh, and don't forget the bread too.