jellify \jel"li*fy\, v. t. & i. [imp. & p. p. {Jellified}; p. pr. & vb. n. {Jellifying}.] To make, or to become, gelatinous; to make into jelly; to jelly. -- {Jel`li*fi*ca"tion}, n. [Webster 1913 Suppl.] Jell-O