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biker

American  
[bahy-ker] / ˈbaɪ kər /

noun

  1. a person who rides a bicycle, motorcycle, or motorbike, especially in competition or as a hobby.

  2. Informal. a member of a motorcycle gang.


biker British  
/ ˈbaɪkə /

noun

  1. informal a member of a motorcyle gang

"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

Etymology

Origin of biker

First recorded in 1880–85; bike 1 + -er 1

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