A semi-solid to almost solid colloid of a solid and a liquid, such as jelly, cheese or opal.
Any gel intended for a particular cosmetic use, such as for styling the hair.
To apply (cosmetic) gel to (the hair, etc).
To become a gel.
To develop a rapport.
He was a nice guy, and I got on OK with his friends, but the two of us never really gelled.
A girl.