- large in amount, value or importance synonym considerable
- substantial sums of money
- a substantial change
- Substantial numbers of people support the reforms.
- He ate a substantial breakfast.
- There are substantial differences between the two groups.
- Their share of the software market is substantial.
- We were able to see a substantial improvement.
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- [usually before noun] (formal) large and solid; strongly built
- a substantial house
- a street of substantial Victorian villas
Word OriginMiddle English: from Old French substantiel or Christian Latin substantialis, from substantia ‘being, essence’, from substant- ‘standing firm’, from the verb substare.
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