mid-15c., "lacking form; not in accordance with the rules of formal logic," from in- (1) "not, opposite of" + formal. Meaning "irregular, unofficial" is from c. 1600. Sense of "done without ceremony" is from 1828. Related: Informally.
雙語例句
1. Council members are due to have informal discussions later on today.
委員會成員定于今日晚些時候進行非正式討論。
來自柯林斯例句
2. The two leaders will retire to Camp David for informal discussions.
兩位領導人將到戴維營進行非正式討論。
來自柯林斯例句
3. Our aim was that these meetings be unstructured and informal.
我們的目的是，這些會議不事先進行精心組織，要隨意一些。
來自柯林斯例句
4. I would like it to be an informal occasion.
我希望把它辦得不那么正式。
來自柯林斯例句
5. His friend was less good-looking, but a lot more informal and relaxed.