A brief rainstorm accompanied by thunder and lightning. (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 "thundershower" in a sentence
"In the thundershower is the question of the distribution of moisture over the earth's surface, the question of the nature and use of clouds, the movement of the air and wind, the condensation of vapor, and the marvelous powers of electricity."
"Nothing personal against Cink, for it is not easy being a thundershower on the parade."
"Tonight: Shower and isolated thundershower chances continue, but diminish from west to east between about 7 p.m. and 11 p.m."