Definition of "Sun" :

noun: the star that is the source of light and heat for the planets in the solar system

"The sun contains 99.85% of the mass in the solar system."

noun: any star around which a planetary system revolves

noun: a person considered as a source of warmth or energy or glory etc

noun: the rays of the sun

"The shingles were weathered by the sun and wind."

noun: first day of the week; observed as a day of rest and worship by most Christians

verb: expose one's body to the sun

verb: expose to the rays of the sun or affect by exposure to the sun

"These herbs suffer when sunned."