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English definition of “substantial”

substantial

adjective   /səbˈstænʃəl/
large in size, value, or importance: substantial benefits/costs/investmenta substantial amount/number/portion of sth Banks make a substantial amount of money investing your money.substantial changes/differences/improvements We've made substantial changes in how we go about doing our business.a substantial increase/reduction/rise in sth The company posted a substantial increase in profits during the year to £3.5m.
[before noun] formal relating to the main or most important things being considered: Unions and bosses reached substantial agreement.
(Definition of substantial adjective from the Cambridge Business English Dictionary © Cambridge University Press)
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