thinnessEtymologyFrom Middle English thynnesse, from Old English þynnes (“thinness, slightness of density, lack of density, tenuity, fluidity, poverty, feebleness of sight, weakness”), equivalent to thin + -ness.thinness means the state or quality of being thin. Lexicurio rates it Rare gem — a strength score of 74 out of 100.nounThe state or quality of being thin.“The beautiful prismatic colours seen on the Labrodore stone are owing to a similar cause, viz. the thinness of the laminæ of which it consists […].”