sun [singular, uncountable] the light and heat from the sun SYNONYM sunshine
the warmth of the afternoon sun
The sun was blazing hot.
This room gets the sun in the mornings.
in the sun We sat in the sun.
The harvested crop is dried in the hot Indian sun.
They've booked a holiday in the sun (= in a place where it is warm and the sun shines a lot).
out of the sun We did our best to keep out of the sun.
Her face had obviously caught the sun (= become red or brown) on holiday.
Too much sun ages the skin.
I was driving westwards and I had the sun in my eyes (= the sun was shining in my eyes).
Patients are advised to avoid sun exposure for six weeks.
Normally, we say "sit/stand in the sun" in an open space such as "on a beach" or "on the street".
But I am not sure I can say "sit/stand in the sun" when I am standing on a spot that is covered with some sunlight inside my house.
There is some sunlight flooding into the room.
You child is standing on the spot that is covered with the sunlight.
Would you say "Don't stand in the sun. You'll get burnt" or "Stay away from the sunlight."?