substantialadjective · Level 1 SAT1having an abundant supply of money or possessions of valueThe foundation made a substantial donation to fund research into tropical disease prevention.ModuleLevel 1Registeracademic, argument, commonCollectionCollection 013SAT Core planAlso in Collection 013facile, munificent, tortuous, erroneous, exemplary, scurrilous, contentious, meritorious and 1 more