casual

adjective
UK /ˈkæʒuəl/
US /ˈkæʒuəl/

Relaxed and not fancy or formal.

She wore casual clothes like jeans and a T-shirt to the party.


OTHER MEANINGS

2. Happening by chance and without planning.

A casual remark led to a long conversation.

3. Not showing deep interest or care; done without much thought.

He gave the painting only a casual glance.

4. A person who does temporary or irregular work.

The cafe hires casuals during the summer.