This is the 15819th most frequent Polish word.
słońce
Sun.
Here, "słońce" refers to the celestial body, the sun, as a noun.
Słońce świeci jasno na niebie.
The sun shines brightly in the sky.
In this sentence, "słońce" is used metaphorically to indicate a term of endearment or something positive and uplifting.
Jesteś moim słońcem, które rozjaśnia każdy dzień.
You are my sunshine that brightens each day.
The phrase "na słońcu" uses "słońce" to describe exposure to sunlight or a sunny condition.