minefield I. \ˈ ̷ ̷ˌ ̷ ̷\noun : an area occupied by mines anchored or sunk in water or buried in the ground for offensive or defensive purposes < tanks could pass through the minefields and engage the enemy — Walter Nash > < minefields are swept by flotillas — F.E.Dodman > II. noun : something resembling a minefield ; especially : a situation or area having many dangers or requiring extreme caution