n. 1. A colloid in which the disperse phase has combined with the dispersion medium to produce a semisolid material, such as a jelly. 2. See gelatin. 3. A jellylike substance used in styling hair. v. gelled, gel·ling, gels v.intr. To become a gel. v.tr. 1. To apply a gel to (the hair). 2. To take shape or become clear: Plans for the project are finally starting to gel. gela·ble adj. |
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