informal

1. 非正式的,不正规的,不拘礼节的 not formal; not following official or established rules, methods, etc.
2. (服装、行为等)适于日常生活的,随便的 (of clothes, behaviour, etc.) suitable for ordinary everyday situations but not for official occasions

informal group非正式群体；非正式组织

informal organization[法]非正式组织

informal communication非正式沟通

informal sector非正式部门

informal education非正规教育

1. These words are informal.
   这些词是非正式用语。
2. We had an informal meeting.
   我们做了非正式的会晤。
3. Once a week we have an informal wine tasting.
   我们一周有一次非正式的品酒活动。
4. An informal work setting helps to build employee enthusiasm and morale.
   不拘形式的工作环境，提高了员工的热情与士气。
5. I meant it to be an informal discussion, but it didn't turn out as I intended (it should).
   我本想随便商量一下，结果事与愿违。