Longman Dictionary of Contemporary English - sun

sun ~1 n 1 the large bright thing in the sky that gives us light and heat, and around which the Earth moves 2 the heat and light that come from the sun  (Too much sun is bad for you. | in the sun)  (Tanya sat in the sun, reading a book.) 3 any star around which planets move 4 catch the sun BrE get the sun AmE a) if someone catches or gets the sun, they become slightly red or brown because they have been outside in the sun b) if a place or room catches or gets the sun, it is very bright and warm when the sun shines 5 under the sun used to emphasize that you are talking about something that includes very large numbers of ideas or things etc  (Santos could talk about any subject under the sun.)  (- see also make hay while the sun shines hay (3)) ~2 v sunned, sunning sun yourself to sit or lie outside when the sun is shining  (a cat sunning itself on the patio)