noun
a unit of length used in navigation; exactly 1,852 meters; historically based on the distance spanned by one minute of arc in latitude
• Hypernyms: ↑nautical linear unit
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a unit of distance at sea or in the air equal to 1.852 kilometers. Also called international air mile.
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international nautical mile,
a unit of linear measure recommended for sea and air navigation and adopted by several countries, equal to 1,852 meters or 6,076.11549 feet.
Useful english dictionary. 2012.