Definition of nappiness in US English:

nappiness

noun

rare
  • The quality or condition of being nappy. In early use: hairiness, shagginess. In later use (chiefly in African-American usage): frizziness of the hair.

noun

  • Obstinacy or disobedience on the part of a horse.

Origin

Early 17th century; earliest use found in Randle Cotgrave (fl. 1587–?1630), lexicographer. From nappy + -ness<br>1930s. From nappy + -ness.

Pronunciation

nappiness

/ˈnapɪnɪs/