The intermediate or middle part of anything. Also, per contractionem, a midshipman.
·noun <<Middle>>. II. Mid ·prep ·see <<Amid>>. III. Mid ·superl Denoting the middle part; as, in m...
Webster's Dictionary of the English Language
·- ·Alt. of Mid-sea. ...
·- The middle part of the sea or ocean. ...
Implies half way across any river, channel, &c. ...
The Sailor's Word-Book