另外有一個英文單字 appointment（聽發音）是＂任命、約會、任用、預約＂等意思，也可以用來表示約定，通常會在後面加上 with 來表示與誰的約定，例如＂我與哥哥約定＂英文翻譯為＂I made an appointment with my brother.＂這樣。
約定英文造句練習
My wife and I have a deal to go to Yilan travel.我與我的老婆約定要去宜蘭旅遊。
Classmates have an appointment after graduation will hold a party each year.
同學們約定畢業後每年都要聚會。
Comply with the agreement is the basic law of interpersonal relationship.
遵守約定是基本的人際關係法則。
The couple set an appointment to get married next year.
這個情侶約定明年要結婚。
We set an appointment to go to the Japanese tourist, you want to join?
我們約定要去日本旅遊，你想加入嗎？
We set an appointment that grow up to startup together.
我們小時候就約定長大後要一起創業。
I made an appointment this afternoon to look at the experimental data with the professor.
我跟教授約定今天下午要看實驗數據。
Do you remember our appointment of two years ago?
你還記得我們兩年前的約定嗎？