Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio.
an opening, often with a cover, through which a person can enter a sewer, conduit, ship's tank, etc. for repair work or inspection
Used by arrangement with John Wiley & Sons, Inc.
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.
A hole, usually with a cover, through which a person may enter a sewer, boiler, drain, or similar structure.