the star that provides light and heat for the earth and around which the earth moves: sun rises/sets The sun rises in the east and sets in the west. The sun's rays are at their most powerful at midday. sun shines We thought we'd go out for a walk while the sun was shining. picture of sun heibaihui/iStock/Getty Images Plus/GettyImages

A1 the light or heat that the earth receives from the sun: I think I've had too much sun today - I have a headache. in the sun Let's go and sit out in the sun. Thesaurus: synonyms, antonyms, and examples brightness that allows you to see lightLight streamed in through the window. brightnessThe brightness of the sun hurt his eyes. illuminationFor professional-quality photos, it is best to use several sources of illumination. sunThis plant needs to be in full sun. sunlightSunlight streamed in through the windows. daylightHow much daylight does this room get? See more results » Fewer examples The sun climbed higher in the sky. They're advising that children be kept out of the sun altogether. The clouds finally parted and the sun came out. She left the midday sun for the cool of the shade. Now I know it won't look very cool, but this hat will keep the sun out of your eyes. SMART Vocabulary: related words and phrases

Idioms everything under the sunthe sun sets on somethingthink the sun shines out (of) someone's arse/backside

sun verb UK /sʌn/ US /sʌn/ sun yourself

to lie or sit somewhere where there is a lot of sun, especially in order to make your skin darker: I sat on the balcony sunning myself. We could see Miranda sunning herself on the dock. Most afternoons, we would sun ourselves on the beach. We were all working hard while you were sunning yourself in the Caribbean. We watched a small lizard sunning itself on the trunk of a tree. Synonym sunbathe SMART Vocabulary: related words and phrases

Sun.

written abbreviation for Sunday SMART Vocabulary: related words and phrases (Definition of sun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press) sun | AMERICAN DICTIONARY