n.

1. a substance that is solid at room temperature and pressure
2. the state in which a substance has no tendency to flow under moderate stress; resists forces (such as compression) that tend to deform it; and retains a definite size and shape;
   solidness, solid state
3. a three-dimensional shape

adj.

1. of definite shape and volume; firm; neither liquid nor gaseous
   
   • ice is water in the solid state
2. characterized by good substantial quality
   
   • solid comfort
   • a solid base hit
3. entirely of one substance with no holes inside
   
   • a solid block of wood
4. of one substance or character throughout
   
   • solid gold
   • carved out of solid rock
5. uninterrupted in space; having no gaps or breaks
   
   • a solid line across the page
   • solid sheets of water
6. providing abundant nourishment;
   hearty, satisfying, square, substantial
   
   • a hearty meal
   • good solid food
   • ate a substantial breakfast
   • four square meals a day
7. of good quality and condition; solidly built;
   strong, substantial
   
   • a solid foundation
   • several substantial timber buildings
8. not soft or yielding to pressure;
   firm
   
   • a firm mattress
   • the snow was firm underfoot
   • solid ground
9. having three dimensions
   
   • a solid object
10. incapable of being seen through
    
    • solid blackness
11. financially sound
    
    • the bank is solid and will survive this attack
12. of a substantial character and not frivolous or superficial
    
    • work of solid scholarship
    • based on solid facts
13. of the same color throughout;
    self-colored, self-coloured
    
    • solid color
14. morally admirable;
    worthy, upstanding
    
    • a worthy citizen
15. acting together as a single undiversified whole;
    unanimous, whole
    
    • a solid voting bloc