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An almost horizontal entrance to a mine.

[Latin aditus, access, from past participle of adīre, to approach : ad-, ad- + īre, to go; see ei- in Indo-European roots.]
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.


(Mining & Quarrying) an almost horizontal shaft into a mine, for access or drainage
[C17: from Latin aditus an approach, from adīre, from ad- towards + īre to go]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈæd ɪt)

a nearly horizontal passage leading into a mine.
[1595–1605; < Latin aditus an approach]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.adit - a nearly horizontal passage from the surface into a mineadit - a nearly horizontal passage from the surface into a mine
mine - excavation in the earth from which ores and minerals are extracted
passage - a way through or along which someone or something may pass
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in classic literature ?
What all these passages are, of course I cannot say, but we thought that they must be the ancient workings of a mine, of which the various shafts and adits travelled hither and thither as the ore led them.
Rattlesnake and Pikes Peak contain numerous historical workings that consist of, milling facilities several adits at different levels, underground workings with vertical shafts, and a network of existing roads providing access to connect all the historical workings.
Where exposed, the Adit Shear Zone contains quartz veining occurring over widths from 1 to over 30 metres.
Adits are horizontal passages leading into a mine for access of water drainage purposes.
Shortly after the sighting, Cimatu had five teams inspect the tunnels and mining items were confiscated: 53 adits, 34 drums for cyanide (both empty and full) and more than 2,000 kilograms of ore from Cab-owan, Last Creek, Paltekan 1 and Paltekan 2 and Demo area.
For Diamer Basha Dam, laboratory testing data and geological mapping of two adits (total length 1183 m) have been used as the input parameters to classify the rock mass.
In our first eight months, we have already negotiated contracts worth pounds 10m ( the best performance among all the regional Adits.
It has been found both in the lower adits and in quartz veins in the upper trenches.
The main problems in planning East Boulder's muck handling systems were the long adits and the orebody's long strike length.
But when she tried to sell the house in Tilewright Close, Kidsgrove, Stoke on Trent, seven years later, she and her husband Richard discovered there were two adits - entrances to mines - running close by.
A total of 464 soil samples were collected, which defined a 60 metre X 300 metre copper soil anomaly on strike with known mineralization exposed in 3 adits. A 2.3 kilogram composite grab sample of mineralized quartz vein was also collected and is reported to have assayed 2.69% copper, 14.4 grams per tonne silver and trace gold.
It is anticipated that this work will commence immediately upon receipt of the necessary permits for the upgrading of existing adits to current standards and bulk sampling.