GNU Collaborative International Dictionary of English

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Found one definition

1.       
   minefield n.
   1. (Mil.) a region in which explosive mines4 have been placed, especially a region on land.
   
   [WordNet 1.5]
   
   
   2. Hence: (Fig.) A situation in which a simple mistake can have disastrous consequences; a touchy or dangerous situation requiring great caution; as, “the candidate threaded his way skillfully through a minefield of loaded questions from the audience”.
   
   [PJC]