sunburn

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Inflammation or blistering of the skin caused by overexposure to direct sunlight.
• transitive & intransitive verb To affect or be affected with sunburn.

from The Century Dictionary.

• To discolor or scorch by the sun; tan: said especially of the skin or complexion.
• To be discolored or tanned by the sun.
• noun A burning or scorching by the sun; especially, the tan occasioned by the exposure of the skin to the action of the sun's rays.
• noun In botany, same as heliosis.
• noun The injury to the leaves or bark of plants produced by the hot sun causing excessive or too rapid evaporation of the water content of the cells, and thus killing the tissues, which become brown. The tips and margins of rapidly growing leaves and the cambium layer of the bark of young trees are most frequently affected. Also called sun-scald. Compare heliosis.

from the GNU version of the Collaborative International Dictionary of English.

• noun The burning or discoloration produced on the skin by the heat of the sun; tan.
• transitive verb To burn or discolor by the sun; to tan.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A burn on the skin caused by excess exposure to the sun's rays.
• verb intransitive To receive a sunburn.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• verb get a sunburn by overexposure to the sun
• noun redness of the skin caused by exposure to the rays of the sun
• noun a browning of the skin resulting from exposure to the rays of the sun