1.of relatively small extent from one surface to the opposite or in cross section;
thin wire
2.lacking excess flesh;
you can't be too rich or too thin
3.very narrow;
a thin line across the page
4.having little substance or significance;
a flimsy excuse
5.not dense;
a thin beard
6.relatively thin in consistency or low in density; not viscous;
air is thin at high altitudes
7.(of sound) lacking resonance or volume;
a thin feeble cry
8.lacking spirit or sincere effort;
a thin smile
9.without viscosity;
the blood was flowing thin
1.lose thickness; become thin or thinner
2.make thin or thinner;
Thin the solution
3.lessen the strength or flavor of a solution or mixture;
cut bourbon
4.take off weight