flare
noun
3.
a burst of light used to communicate or illuminate
4.
reddening of the skin spreading outward from a focus of infection or irritation
5.
a sudden recurrence or worsening of symptoms
6.
a sudden eruption of intense high-energy radiation from the sun's surface; associated with sunspots and radio interference
7.
an unwanted reflection in an optical system (or the fogging of an image that is caused by such a reflection)
8.
a sudden outburst of emotion
9.
a device that produces a bright light for warning or illumination or identification
10.
a short forward pass to a back who is running toward the sidelines
11.
(baseball) a fly ball hit a short distance into the outfield