nautical mile
Share:
Tweet n. Abbr. nm A unit of length used in sea and air navigation, based on the length of one minute of arc of a great circle, especially an international and US unit equal to 1,852 meters (about 6,076 feet). Also called sea mile. |
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.