To solidify is to make something solid, like water becoming ice, or a plan becoming more concrete. If you’re meeting a friend, you should solidify the plan before you go and decide where and what time to meet.

To solidify is to become a solid, like lemonade solidifying into a popsicle, or dissolved sugar solidifying into yummy rock candy. Also, this word can apply to non-physical things. If a couple gets engaged, they're solidifying their relationship. Getting a promotion could solidify your career. Anything becoming firmer or more real is a type of solidifying. In any sense, whatever gets solidified becomes stronger.

Definitions of solidify

v become solid

“The metal solidified when it cooled”
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form into a solid mass or whole
congeal, jell, set
become gelatinous
crystalise, crystalize, crystallize, effloresce
assume crystalline form; become crystallized
freeze, freeze down, freeze out
change from a liquid to a solid when cold
become crystalline
Type of:
change integrity
change in physical make-up

v make solid or more solid; cause to solidify

make or form into a solid or hardened mass
form into a solid mass; coalesce
Type of:
change integrity
change in physical make-up

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