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To suddenly gain strength and burst forth, as of a fire. This phrase can be used to describe a literal blaze or any worsening situation. I thought I had contained the fire, but when the flames blazed up again, I called the fire department. Things had been peaceful between my aunts for months, but old grievances blazed up again on our family vacation.
1. Lit. [for flames] to expand upward suddenly. The fire blazed up and warmed all of us. As the fire blazed up, we moved away from the fireplace.
2. Fig. [for trouble, especially violent trouble] to erupt suddenly. The battle blazed up again, and the fighting started to become fierce. As the battle blazed up, the cowards fled into the hills.