ENGLISH
REFERENCE

sun

n. · v.
US //ˈsən// UK //sˈʌn// sun
  1. 1 the star (n.)
    A1 Beginner Astronomy

    the large, bright star that the Earth moves around and that gives us light and heat.

    the star at the centre of the Solar System around which the Earth and other planets orbit.

    Example

    The sun rose early this morning, filling the room with light.

    Example

    Astronomers have calculated that the sun is approximately 4.6 billion years old and is currently in its stable main-sequence phase.

    Pitfall
    I saw sun in the sky.
    I saw the sun in the sky.

    When referring to the specific star in our solar system, always use the definite article 'the'.

  2. 2 sunlight (n.)
    A2 Elementary

    the light and heat that come from the sun.

    the radiant energy, specifically light and heat, received from the sun.

    Example

    We sat in the sun for an hour to get warm.

    Example

    The architect designed the atrium to maximise the amount of natural sun entering the building during the winter months.

Show 2 more sensesShow fewer
  1. 3 other stars (n.)
    B2 Upper Intermediate Astronomy

    any star that is the centre of its own system of planets.

    any star, especially when considered as the central body of a planetary system.

    Example

    Scientists are looking for planets that travel around distant suns.

    Example

    The discovery of exoplanets suggests that many distant suns may host planetary systems capable of supporting life.

  2. 4 to sit in the sun (v.)
    B1 Intermediate

    to sit or lie in the light of the sun, usually to get warm or to tan.

    to expose oneself or something to the direct rays of the sun.

    Example

    The cat liked to sun itself on the balcony every afternoon.

    Example

    After the long winter, the villagers gathered in the square to sun themselves and enjoy the first signs of spring.

    Usage

    Often used reflexively as 'to sun oneself'.

Word family
Idioms9 entries

© 2026 English Reference