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Synonyms

solidify

American  
[suh-lid-uh-fahy] / səˈlɪd əˌfaɪ /

verb (used with object)

solidified, solidifying
  1. to make solid; make into a hard or compact mass; change from a liquid or gaseous to a solid form.

  2. to unite firmly or consolidate.

  3. to form into crystals; make crystallized.


verb (used without object)

solidified, solidifying
  1. to become solid.

  2. to form into crystals; become crystallized.

solidify British  
/ səˈlɪdɪˌfaɪ /

verb

  1. to make or become solid or hard

  2. to make or become strong, united, determined, etc

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

  • nonsolidified adjective
  • nonsolidifying adjective
  • oversolidify verb (used with object)
  • resolidify verb
  • solidifiability noun
  • solidifiable adjective
  • solidifiableness noun
  • solidification noun
  • solidifier noun
  • unsolidified adjective

Etymology

Origin of solidify

From the French word solidifier, dating back to 1790–1800. See solid, -ify

Explanation

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.

Keep Reading on Vocabulary.com

Vocabulary lists containing solidify

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Kelonia is even trying to solidify the drug’s use for autoimmune diseases.

From Barron's • Apr. 22, 2026

The Toronto Raptors triumphed 128-114 against the Miami Heat while the Houston Rockets won 113-102 against Philadelphia 76ers to solidify their chances of a play-off place.

From BBC • Apr. 10, 2026

The plan’s success could solidify the image of U.S. as a leader in space, and give it ample mining access to a plethora of minerals and elements on the moon.

From Salon • Apr. 9, 2026

Their findings, presented at a major visualization science conference, solidify Schrödinger's framework by showing that these core color qualities arise from the internal structure of the color system itself.

From Science Daily • Feb. 23, 2026

Inch by inch, Clare saw his fate solidify.

From "The Undead Fox of Deadwood Forest" by Aubrey Hartman