considerable in size or quantity; significantly large
a substantial income
ample to satisfy and nourish
a substantial meal
firmly constructed; solid
being largely but not wholly the specified thing
a substantial lie
having material existence; real
well-to-do; prosperous
relating to the fundamental substance or essence of something
substantiality /-shiʹaliti/ noun
substantially adv
[Middle English via Old French substantiel from late Latin substantialis, from Latin substantia: see substance]