First Known Use: before 12th century
Dictionary
1sun
noun \ˈsən\
: the star that the Earth moves around and that gives the Earth heat and light
: any star that has planets which move around it
: the heat or light produced by the sun : sunshine or sunlight
Full Definition of SUN
1
a often capitalized : the luminous celestial body around which the earth and other planets revolve, from which they receive heat and light, which is composed mainly of hydrogen and helium, and which has a mean distance from earth of about 93,000,000 miles (150,000,000 kilometers), a linear diameter of 864,000 miles (1,390,000 kilometers), and a mass 332,000 times greater than earth b : a celestial body like the sun : star
2
: the heat or light radiated from the sun <played in the sun all day>
3
: one resembling the sun (as in warmth or brilliance)
4
: the rising or setting of the sun <from sun to sun>
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Origin of SUN
Middle English sunne, from Old English; akin to Old High German sunna sun, Latin sol — more at solar
Other Astronomy Terms
2sun
verb
: to sit or lie in the light of the sun especially in order to make your skin darker
sunnedsun·ning
Full Definition of SUN
transitive verb
: to expose to or as if to the rays of the sun
intransitive verb
: to sun oneself
See sun defined for English-language learners
First Known Use of SUN
15th century
Sun
abbreviation
Definition of SUN
Sunday
SUN Defined for Kids
1sun
noun \ˈsən\
Definition of SUN for Kids
1
: the heavenly body in our solar system whose light makes our day and around which the planets revolve
2
: sunshine 1 <I'm going outside to get some sun.>
3
: a heavenly body like our sun
2sun
verb
sunnedsun·ning
Definition of SUN for Kids
: to expose to or lie or sit in the rays of the sun
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