Definition of collapsar
: a massive star that undergoes gravitational collapse especially after colliding with another star <Collapsars are massive stars, which in the course of merging with a compact companion undergo core collapse leading to a BH [black hole] … leaving a supernova-like remnant. — P. Mészáros, Science, 5 Jan. 2001> <Today most astronomers think gamma-ray bursts result when a massive and rapidly rotating star collapses in on itself to form a black hole. The collapsing star, or collapsar, is a kind of supernova, but the extraordinary heft and spin of the star bring it to a faster and more calamitous end. — Karen Wright, Discover, August 2002>; broadly : black hole 2 <This classification of stars results in three main types: regular stars (covering white dwarfs to super-giants) …, neutron stars and pulsars, … and collapsars (i.e. black holes) … . — Pierre A. Millette, Progress in Physics, January 2014>
Wait, there’s more! This word doesn't usually appear in our free dictionary, but we’ve shared just a bit of the information that appears in our premium Unabridged Dictionary. There’s more definition detail there.
What else do you get in the Unabridged Dictionary?
- 300,000 words that aren’t in our free dictionary
- Expanded definitions, etymologies, and usage notes
- Advanced search features
- Ad free
Origin and Etymology of collapsar
1collapse + -ar (as in quasar)
First Known Use: 1971
Seen and Heard
What made you want to look up collapsar? Please tell us where you read or heard it (including the quote, if possible).