The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
or half pipenoun
- A smooth-surfaced structure shaped like a trough and used for stunts in sports such as in-line skating and snowboarding.
- A sports event in which a halfpipe serves as the course or area of competition.