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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

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.

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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.

“I think she has an opportunity to solidify the Latino vote with a strong primary performance,” said Matt Barreto, a professor of political science and Chicana/o studies at UCLA.

From Los Angeles Times • May 17, 2026

“Instead, Black voters from these areas were dispersed across multiple districts, . . . which may solidify Democratic support but are not necessarily structured to enhance Black political influence.”

From The Wall Street Journal • May 10, 2026

Several analysts have also commented on the possibility that SpaceX could eventually merge with Tesla, which would likely help Musk solidify his control over both companies.

From MarketWatch • May 1, 2026

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

From Barron's • Apr. 22, 2026

She had wanted him to make her feel justified, solidify her right to self-pity, encourage her to occupy a larger portion of the moral high ground.

From "Half of a Yellow Sun" by Chimamanda Ngozi Adichie

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