star
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About Our Definitions: All forms of a word (noun, verb, etc.) are now displayed on one page.1star
noun, often attributive \ˈstär\Definition of STAR
See Examples of STAR
- They gazed up at the stars.
- There are billions of stars in the universe.
- I'm glad we didn't use the tent. It's so much nicer to sleep outside under the stars.
- The restaurant was awarded four stars for excellence.
- Critics give the movie three stars.
Origin of STAR
Related to STAR
- Antonyms
- nobody, noncelebrity
Other Astronomy Terms
2star
verbDefinition of STAR
Examples of STAR
- The new television series stars a famous movie actress.
- a concert starring some of the biggest names in the business
- He starred in both baseball and football when he was in college.
- She starred for the basketball team last year.
- This restaurant is starred in the guidebook.
First Known Use of STAR
3star
adjectiveDefinition of STAR
Examples of STAR
- <looking for star actors to play the leads>
First Known Use of STAR
star
noun (Concise Encyclopedia)Any massive celestial body of gas that shines by radiant energy generated inside it. The Milky Way Galaxy contains hundreds of billions of stars; only a very small fraction are visible to the unaided eye. The closest star to Earth is the Sun. The closest star to the Sun is about 4.2 light-years away; the most distant are in galaxies billions of light-years away. Single stars such as the Sun are the minority; most stars occur in pairs and multiple systems (see binary star). Stars also associate by their mutual gravity in larger assemblages called clusters (see globular cluster; open cluster). Constellations consist not of such groupings but of stars in the same direction as seen from Earth. Stars vary greatly in brightness (magnitude), colour, temperature, mass, size, chemical composition, and age. In nearly all, hydrogen is the most abundant element. Stars are classified by their spectra (see spectrum), from blue-white to red, as O, B, A, F, G, K, or M; the Sun is a spectral type G star. Generalizations on the nature and evolution of stars can be made from correlations between certain properties and from statistical results (see Hertzsprung-Russell diagram). A star forms when a portion of a dense interstellar cloud of hydrogen and dust grains collapses from its own gravity. As the cloud condenses, its density and internal temperature increase until it is hot enough to trigger nuclear fusion in its core (if not, it becomes a brown dwarf). After hydrogen is exhausted in the core from nuclear burning, the core shrinks and heats up while the star's outer layers expand significantly and cool, and the star becomes a red giant. The final stages of a star's evolution, when it no longer produces enough energy to counteract its own gravity, depend largely on its mass and whether it is a component of a close binary system (see black hole; neutron star; nova; pulsar; supernova; white dwarf star). Some stars other than the Sun are known to have one or more planets (see extrasolar planet). See also Cepheid variable; dwarf star; eclipsing variable star; flare star; giant star; Populations I and II; supergiant star; T Tauri star; variable star.
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