bestseller

or best sell·er

[ best-sel-er ]
/ ˈbɛstˈsɛl ər /

noun

a book that is among those having the largest sales during a given period.
any product that among those of its kind is selling particularly well at a given time: This car was a bestseller last year.

Origin of bestseller

An Americanism dating back to 1885–90; best + seller
Related formsbest·sell·er·dom, nounbest-sell·ing, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for bestseller

British Dictionary definitions for bestseller

bestseller

/ (ˌbɛstˈsɛlə) /

noun

a book, record, CD, or other product that has sold in great numbers, esp over a short period
the author of one or more such books, etc
Derived Formsbestselling, adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012