What is the meaning of Sunburn?

A burn on the skin caused by excess exposure to the sun's rays.

A burn on the tissue of crop plants or their fruits (especially if they are rich in water like tomatoes, grapes, apples, gooseberries) caused by excess exposure to the sun's rays.

Suntan.

To receive a sunburn.

To burn or tan (someone's skin) by the sun; to allow (a part of one's body) to become sunburnt.

Source: wiktionary.org