A colloid in which the disperse phase has combined with the dispersion medium to produce a semisolid material, such as a jelly, A jellylike substance used in styling hair, A gelatinous or albuminous protoplasmic substance, especially the protoplasm of nerve-cells, verb_ become a gel, apply a styling gel to, intransitive verb_ To become a gel, To apply a gel to (the hair), To take shape or become clear, transitive verb_ To apply (cosmetic) gel to (the hair, etc)