A star that suddenly becomes much brighter and then gradually returns to its original brightness over a period of weeks to years.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "nova" in a sentence
"(NOH-vuh) In astronomy, the appearance of a new star in the sky (nova is Latin for new)."
"Benelli makes high dollar shotguns and they're the best made in my opinion. the super nova is my answer."
"Although a nova is much less energetic than a supernova, if recurrent novas are not violent enough to expel more gas than is falling in, mass will accumulate onto the white dwarf star until it passes its Chandrasekhar limit."