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solidity

noun [U] (FIRM)
 
 
/səˈlɪd.ɪ.ti/ US  /-ə.t̬i/ (also solidness)

Definition

the quality of being hard or firm, not a liquid or gasThe state of matter
(Definition of solidity noun (FIRM) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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