Merriam-Webster Collegiate Dictionary - substantial

 adjective  Date: 14th century  1.  a. consisting of or relating to substance  b. not imaginary or illusory ; real, true  c. important, essential  2. ample to satisfy and nourish ; full a ~ meal  3.  a. possessed of means ; well-to-do  b. considerable in quantity ; significantly great earned a ~ wage  4. firmly constructed ; sturdy a ~ house  5. being largely but not wholly that which is specified a ~ lie  • ~ noun  • ~ity noun  • ~ly adverb  • ~ness noun