noun, plural au·dac·i·ties.
- boldness or daring, especially with confident or arrogant disregard for personal safety, conventional thought, or other restrictions.
- effrontery or insolence; shameless boldness: His questioner’s audacity shocked the lecturer.
- Usually audacities. audacious or particularly bold or daring acts or statements.
mid-15c., from Medieval Latin audacitas “boldness,” from Latin audacis genitive of audax (see audacious).