Definition of nugacity in US English:

nugacity

noun

rare
  • 1Triviality or frivolity.

    1. 1.1 A trivial or frivolous thing or idea.

Origin

Late 16th century: from late Latin nugacitas, from Latin nugax, nugac- ‘trifling, frivolous’.

Pronunciation

nugacity

/n(y)o͞oˈɡasədē/