Order, Request
noun, verbal noun, の adjective
You pour writing onto a form. You're filling out this form to order something new for yourself. It's a formal request to get this new thing (imagine it being something you're excited about ordering right now, and imagine yourself ordering it by pouring writing onto an order form).
ちゅうもん
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
スタバの注文の仕方がよく分からないんだけど。
I don't really understand how to order at Starbucks.
このドレス、ネットで注文できるよ。
You can order this dress online.
それは無理な注文だが、やるっきゃない。
That’s an unreasonable request but we don’t have a choice.