noun Military, Naval.

an area of land or water throughout which explosive mines have been laid.

Origin of minefield

First recorded in 1885–90; mine2 + field
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for minefield



an area of ground or water containing explosive mines
a subject, situation, etc, beset with hidden problems
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for minefield

1877, from mine (n.2) + field (n.). Figurative use by 1947.

Online Etymology Dictionary, © 2010 Douglas Harper