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half·pipeor half pipe (hăf′pīp′, häf′-)
1. A smooth-surfaced structure shaped like a trough and used for stunts in sports such as in-line skating and snowboarding.
2. A sports event in which a halfpipe serves as the course or area of competition.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
a course shaped like the bottom half of a pipe, used for performing skateboarding or snowboarding stunts.Also, half′-pipe`.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.