Definitions of flare:

• noun:   (baseball) a fly ball hit a short distance into the outfield
• noun:   a device that produces a bright light for warning or illumination or identification
• noun:   a burst of light used to communicate or illuminate
• noun:   a sudden outburst of emotion

  Example: "She felt a flare of delight"

• noun:   am unwanted reflection in an optical system (or the fogging of an image that is caused by such a reflection)
• noun:   a sudden burst of flame
• noun:   a shape that spreads outward

  Example: "The skirt had a wide flare"

• noun:   a sudden recurrence or worsening of symptoms

  Example: "A colitis flare"

• noun:   reddening of the skin spreading outward from a focus of infection or irritation
• noun:   a short forward pass to a back who is running toward the sidelines

  Example: "He threw a flare to the fullback who was tackled for a loss"

• noun:   a sudden eruption of intense high-energy radiation from the sun's surface; associated with sunspots and radio interference
• verb:   burn brightly

  Example: "Every star seemed to flare with new intensity"

• verb:   shine with a sudden light

  Example: "The night sky flared with the massive bombardment"

• verb:   become flared and widen, usually at one end

  Example: "The bellbottom pants flare out"

• verb:   erupt or intensify suddenly

  Example: "Tempers flared at the meeting"