from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A sewer or drain crossing under a road or embankment.
- n. The part of a road or embankment that passes over such a sewer or drain.
- n. The channel or conduit for such a sewer or drain.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A transverse channel under a road or railway for the draining of water.
from the GNU version of the Collaborative International Dictionary of English
- n. A transverse drain or waterway of masonry under a road, railroad, canal, etc.; a small bridge.
from The Century Dictionary and Cyclopedia
- n. An arched or flat-covered drain of brickwork or masonry carried under a road, railroad, canal, etc., for the passage of water.
- False; villainous.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a transverse and totally enclosed drain under a road or railway
Origin unknown.(American Heritage® Dictionary of the English Language, Fourth Edition)
Obscure, possibly dialect or related to the name of the long-forgotten inventor, or possibly from French couvert ("covered"), although couvert cannot be used in the same way, and the introduction of an l to make the English word is difficult to explain. (Wiktionary)