1 the quality of having a small distance between two opposite sides:
2 the quality of having only a small number of people or a small amount of something:
3 the quality of being of a poor standard or not good enough to be effective:
the thinness of the singer's voice
4 the quality of flowing easily or containing a lot of water:
5 (of air) the quality of containing less oxygen than usual:
The thinness of the air can make you feel breathless.
At its most extreme, the obsession with thinness can cause eating disorders.
They hope for a time when good health, not extreme thinness, is the ideal among various cultures.
The thinness of his face and the jutting of his cheekbones suggest hunger.
The slices of rock are polished to a thinness of less than a millimetre.
The abnormal thinness of the eggshells was evident when ornithologists compared them with other specimens.
The comparative thinness of the blade makes it quite easy to cut in tight curves.
They were surprised by the thinness of the pillows in their hotel room.
