This meaning describes situations, behaviour, or clothing that do not follow strict official rules.
The meeting was friendly and informal.
You can wear informal clothes to the event.
This meaning describes words and expressions mainly used in everyday speech or casual writing.
Kids is an informal word for children.
This expression is common in informal English.
This meaning refers to agreements, groups, or systems that exist without official approval or structure.
They reached an informal agreement after the meeting.
An informal group of residents organized the event.
