from The American Heritage® Dictionary of the English Language, 4th Edition
- intransitive v. To become firm or gelatinous; congeal. See Synonyms at coagulate.
- intransitive v. To take shape or fall into place; crystallize: A plan of action finally jelled in my mind.
- transitive v. To cause to become firm or gelatinous.
- transitive v. To cause to take shape; make clear and definite; crystallize.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. a jelly or gel
- v. To gel
from the GNU version of the Collaborative International Dictionary of English
- intransitive v. To jelly.
- intransitive v. To take on a more concrete or substantial form; -- of ideas, plans, programs, etc.
from The Century Dictionary and Cyclopedia
- To assume the consistence of jelly.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- v. become gelatinous
Probably back-formation from jelly.(American Heritage® Dictionary of the English Language, Fourth Edition)