Meaning of flareup

flare•up

Pronunciation: (flâr'up"), [key]
— n.
  1. a sudden flaring up of flame or light.
  2. a sudden outburst or intensification, as of anger or tensions.
  3. a sudden outbreak of violence, disease, or any other condition thought to be quelled, checked, or inactive.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.