► adjective (quieter, quietest)
1. making little or no noise: the car has a quiet, economical engine | I was as quiet as I could be, but he knew I was there.
■ (of a place, period of time, or situation) without much activity, disturbance, or excitement: the street below was quiet, little traffic braving the snow.
■ without being disturbed or interrupted: all he wanted was a quiet drink.
2. carried out
discreetly, secretly, or with moderation: we wanted a quiet wedding | I’ll have a quiet word with him.
■ (of a person) tranquil and reserved by nature: his quiet, middle-aged parents.
■ expressed in a restrained or understated way: Molly spoke with quiet confidence.
Oxford English Dictionary