Definition of "adit" []

• An almost horizontal entrance to a mine. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The "adit" -- or water-conducting -- level by which the spot was reached commenced at the cliffs, on a level with the seashore, and ran into the interior until it reached the old mine, about"
• "He said: 'It is believed that she was climbing around an adit, which is an entrance to a mine."
• "GRC geologists mapped the adit, which is 40 meters in length and took channel samples, each approximately one meter or more in width across the vein and at two meter intervals along the strike of the vein."