say it: THIN-nis
thinness is a noun meaning "relatively small dimension through an object as opposed to its length or width". It carries 5 recorded senses.
relatively small dimension through an object as opposed to its length or width
“the tenuity of a hair”
“the thinness of a rope”
the property of having little body fat
the property of being very narrow or thin
“he marvelled at the fineness of her hair”
the property of being scanty or scattered; lacking denseness
a consistency of low viscosity
“he disliked the thinness of the soup”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for thinness come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.