adjective

"Ajar" means "slightly open." For example, if a door is ajar, it's not fully closed but open just a little bit.

Example

1. She left the door slightly ajar, allowing a sliver of light to escape into the hallway.
2. He opened the window ajar to allow some fresh air into the room.
3. I heard a creak as the door opened ajar and a figure entered the room.