(formerly) a marine mounted on horseback or a cavalryman doing duty on shipboard.
a person out of his or her proper or natural place.
Before X Was X: The Dark Horse Story Of The 24th LetterSince its inception, the letter X has struggled to establish its own identity, so it may be no coincidence that X is commonly used to represent the unknown in both language and mathematics. But, how was it created?
Origin of horse marine
First recorded in 1810–20
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for horse marine
What, do you mean to say that lankey, horse-marine looking fellow is as bad as that!Varney the Vampire|Thomas Preskett Prest
He did not look much like a horse-marine, but reminded me more of a city hosier.The Memoirs of Harriette Wilson, Volumes One and Two|Harriette Wilson
British Dictionary definitions for horse marine
(formerly) a mounted marine or cavalryman serving in a ship
someone out of his natural element, as if a member of an imaginary body of marine cavalry
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012