1. (adj) concrete
a strong hard building material composed of sand and gravel and cement and water
Antonyms: liquid, ideological, ideational, conceptional, conceptual, notional, ideologic, gaseous, ideal, abstract
2. (adj) concrete
capable of being perceived by the senses; not abstract or imaginary
Antonyms: conceptual, ideal, ideational, liquid, notional, ideological, conceptional, gaseous, abstract, ideologic
3. (verb) concrete
formed by the coalescence of particles
Antonyms: ideological, liquid, ideologic, notional, conceptual, conceptional, abstract, ideational, ideal, gaseous
4. (verb) concrete
cover with cement
Antonyms: gaseous, ideal, liquid, ideologic, ideational, conceptional, notional, abstract, ideological, conceptual
5. (verb) concrete
form into a solid mass; coalesce
Antonyms: liquid, ideal, notional, ideational, abstract, ideologic, conceptual, gaseous, conceptional, ideological
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Synonyms and Antonyms of concrete 
