Simple Definition of sun

from our Learner's Dictionary

sun

1 of 2

noun

plural suns
1
a
: the star that the Earth moves around and that gives the Earth heat and light
The rain has stopped and the sun is shining.
The sun rises in the east and sets in the west.
the rising/setting sun
the warmth of the sun's rays
b
: any star that has planets which move around it
They dream of traveling to distant suns.
2
: the heat or light produced by the sun : sunshine or sunlight
The plant needs full sun. [=it should not be in the shade]
Try to keep out of the sun.
The cat lay basking in the sun.
I couldn't see because the sun was in my eyes. [=the bright light of the sun was shining directly in my eyes]
We went to the beach to get/catch some sun. [=to spend time in the sunlight]

sun

2 of 2

verb

suns; sunned; sunning
: to sit or lie in the light of the sun especially in order to make your skin darker
He is sunning [=sunbathing] by the pool.
People sunned themselves on the hillside.

Cite this Entry

“Sun.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/sun. Accessed 17 Apr. 2026.

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