Informal | Mean of informal in English Dictionary

/ɪnˈfoɚməl/

• not formal: such as
• having a friendly and relaxed quality
1. an informal party
2. We had an informal meeting over lunch.
3. an informal conversation
4. an informal writing style
5. He has an informal manner that puts people at ease.
• suited for ordinary use when you are relaxing
1. informal clothes
2. an informal dining area

• relaxed in tone
1. He spoke to them in informal Spanish/English.
2. The term is common in informal contexts.
3. informal language/speech/writing
4. an informal word
• done in a way that is not especially careful or scientific
1. He took an informal poll/survey among his coworkers.