To wrap up or tuck in (something) by enveloping it in cloth, paper, etc.; to roll up in (covering).
プレゼントをきれいな紙で包む（包む）。
Wrap the present in pretty paper.
赤ちゃんを毛布でくるんで寝かせた。
I wrapped the baby in a blanket and put him to sleep.
焼き魚をアルミホイルでくるんでオーブンに入れる。
Wrap the grilled fish in aluminum foil and put it in the oven.