I. gel 1 /dʒel/ BrE AmE noun [uncountable and countable]
a thick wet substance that is used in beauty or cleaning products:
hair gel
shower gel
II. gel 2 BrE AmE verb ( past tense and past participle gelled , present participle gelling )
1 . ( also jell especially American English ) [intransitive] if a thought, plan etc gels, it becomes clearer or more definite:
Don’t start writing until the idea has gelled in your mind.
2 . ( also jell especially American English ) [intransitive] if two or more people gel, they start working well together as a group
gel with
He did not gel with Chapman.
After two days, the group gelled into a team.
3 . ( also jell especially American English ) [intransitive] if a liquid gels, it becomes firmer or thicker
4 . [transitive] to put gel into your hair:
gelled hair
III. gel 3 /dʒel/ BrE AmE noun [countable] British English old-fashioned
used to represent the word ‘girl’, when it is said in this way