1) ADJ-GRADED: usu v-link ADJ Informal speech or behaviour is relaxed and friendly rather than serious, very correct, or official.
She is refreshingly informal...
His friend was less good-looking, but a lot more informal and relaxed.Ant:Derived words:informally ADV-GRADED ADV after v
She was always there at half past eight, chatting informally to the children.informality [[t]ɪnfɔː(r)mæ̱lɪti[/t]] N-UNCOUNT
He was overwhelmed by their cheerfulness and friendly informality.2) ADJ-GRADED An informal situation is one which is relaxed and friendly and not very serious or official.
I would like it to be an informal occasion...
The house has an informal atmosphere.Ant:Derived words:informality N-UNCOUNT
Eleanor enjoyed the relative informality of island life.3) ADJ-GRADED Informal clothes are casual and suitable for wearing when you are relaxing, but not on formal occasions.
Most of the time Jenny needs informal clothes...
For lunch, dress is informal.Syn:Ant:Derived words:informally ADV-GRADED
Everyone dressed informally in shorts or faded jeans, and baggy sweatshirts.4) ADJ: usu ADJ n You use informal to describe something that is done unofficially or casually without planning.
The two leaders will retire to Camp David for informal discussions.
...an informal meeting of EC ministers...
We had an informal party at a hotel, and people just flooded in.Derived words:informally ADV
He began informally to handle Ted's tax affairs for him.
English dictionary. 2008.