Definition of "Thin" :
verb: take off weight
verb: lessen the strength or flavor of a solution or mixture
verb: make thin or thinner
"Thin the solution."
verb: lose thickness; become thin or thinner
adjective: not dense
"A thin beard."
adjective: lacking excess flesh
"You can't be too rich or too thin."
adjective: (of sound) lacking resonance or volume
"A thin feeble cry."
adjective: lacking substance or significance
"A thin plot."
adjective: lacking spirit or sincere effort
"A thin smile."
adjective: of relatively small extent from one surface to the opposite or in cross section
adjective: relatively thin in consistency or low in density; not viscous
"Air is thin at high altitudes."
adjective: very narrow
"A thin line across the page."
adverb: without viscosity
"The blood was flowing thin."