A bowler plays in front of a group of onlookers.
onlooker definition by Webster's New World
a person who watches without taking part; spectator
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
- onlooking adjective, noun
onlooker definition by American Heritage Dictionary
One that looks on; a spectator.