Longman Dictionary of Contemporary English homepage

Date: 1300-1400
Language: Late Latin
Origin: substantialis, from Latin substantia; SUBSTANCE

substantial

 adjective
     
sub‧stan‧tial S2 W2
1 large in amount or number [= considerable]:
We have the support of a substantial number of parents.
a substantial salary
a substantial breakfast
The document requires substantial changes.
2 [only before noun] large and strongly made:
a substantial piece of furniture
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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