Definition of sun

Short definition: The word sun means the bright star in the sky that gives the Earth light and warmth, shapes daily life and seasons, and is often linked with daytime, energy, growth, and positive feelings.

Looking for a clear and natural explanation of the word sun? The word sun is one of the most basic and powerful words in English. It refers to the star at the center of our solar system, but it is also used symbolically to talk about warmth, light, life, energy, and hope. You will hear it in science, weather reports, poetry, daily conversation, and emotional expressions. Because it is both literal and figurative, its meaning depends strongly on context. Below, each meaning is explained in a calm and natural way, with enough detail to feel clear, human, and meaningful.

Forms: sun, suns
Related: solar adj., sunlight n., sunshine n.
Syllable: sun

1. (Noun) The star at the center of the solar system that provides light heat and energy to the Earth.

   The sun is a massive star located at the center of our solar system, whose light and heat make life on Earth possible by warming the planet, driving weather systems, and supporting plant growth through photosynthesis.

   The sun rose slowly over the horizon, filling the sky with light and signaling the start of a warm summer day.
   Scientists study the sun to understand how solar activity affects climate and communication systems on Earth.
   Without the sun, life as we know it would not be able to exist on this planet.

   Synonyms: star, solar body, daylight source, solar star, central star, light source, heat source, solar mass, life giving star, daytime star, cosmic star, energy source
   Antonyms: darkness, night, shadow, moon, absence of light, cold, eclipse, blackout, gloom, dimness, void, obscurity

2. (Noun) Sunlight or warm weather caused by the sun.

   In everyday language, the sun can mean bright daylight or warm weather, often associated with comfort, outdoor activities, and pleasant conditions.

   They sat outside enjoying the sun while talking and drinking coffee in the fresh air.
   After days of rain, the return of the sun lifted everyone’s mood.
   Too much sun can cause skin damage if you do not protect yourself properly.

   Synonyms: sunshine, daylight, warm weather, brightness, sunlight, clear sky, fair weather, heat, summer light, brightness of day, sunny conditions, warmth
   Antonyms: shade, rain, cloudiness, cold weather, darkness, night, gloom, overcast sky, storm, chill, wet weather, dim light

3. (Noun) A symbol of warmth happiness hope or positive energy.

   Figuratively, the sun is often used to represent joy optimism love or hope, suggesting something or someone that brings light comfort or positivity into a situation or life.

   Her smile felt like the sun after a long difficult week at work.
   The child was described as the sun of the family because of his cheerful energy.
   Music became his sun during dark moments, helping him stay hopeful.

   Synonyms: joy, warmth, hope, happiness, positive force, light, brightness, comfort, uplifting presence, source of joy, emotional warmth, optimism
   Antonyms: sadness, gloom, darkness, despair, negativity, coldness, depression, sorrow, emotional shadow, hopelessness, grief, emptiness