informal
adjective uk/ɪnˈfɔː.məl/ us/ɪnˈfɔːr.məl/
B2 非正式的，非正规的;（服装）日常使用的;（言行）随意的
(of situations) not formal or official, or (of clothing, behaviour, speech) suitable when you are with friends and family but not for official occasions
The two groups agreed to hold an informal meeting. 两个集团同意举行一次非正式会议。
He's the ideal sort of teacher - direct, friendly, and informal. 他属于那种理想的教师——坦率、友好且不拘礼节。
"Hi" is an informal way of greeting people. “喂”是一种随意的问候方式。
- More examples
- What was once an informal event has now become institutionalized.
- People chatting at a party will usually be talking in an informal register.
- Many informal expressions are gaining currency in serious newspapers.
- The party itself was a fairly informal affair.
- They started as informal gatherings but they have become increasingly formalized in the last few years.