a brake on the hub of the rear wheel of freewheel bicycles, operated by back pressure on the pedals.
Origin of coaster brake
First recorded in 1885–90
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for coaster brake
The arrangement of the coaster-brake hub produces the same effect as a coaster brake on a bicycle.The Boy Mechanic, Book 2|Various