Fat"ness, n. 1.
The quality or state of being fat, plump, or full-fed;
corpulency; fullness of flesh.
Their eyes stand out with fatness.
Ps. lxxiii. 7.
2. Hence; Richness; fertility;
fruitfulness.
Rich in the fatness of her plenteous
soil.
Rowe.
3. That which makes fat or fertile.
The clouds drop fatness.
Philips.