1. the quality of lacking intensity or substance - "a shrill yet sweet tenuity of voice"- Nathaniel Hawthorne • Syn: feebleness • Derivationally related forms: feeble (for: feebleness), tenuous • Hypernyms: weakness 2. a rarified quality - the tenuity of the upper atmosphere • Syn: rarity, low density • Derivationally related forms: tenuous, rare (for: rarity) • Hypernyms: density, denseness 3. relatively small dimension through an object as opposed to its length or width - the tenuity of a hair - the thinness of a rope • Syn: thinness, slenderness • Ant: thickness (for: thinness) • Derivationally related forms: slender (for: slenderness), tenuous, thin (for: thinness) • Hypernyms: dimension