Definition of "light-horseman" in Anglais

noun

1. A soldier who serves in the light cavalry.

2. (US, obsolete) A member of species Chaetodipterus faber of West Indian fish with a high dorsal fin and brilliant colours.

3. (Australia, obsolete) A member of species Pagrus auratus of snapper, whose skull is shaped in the front like a cap worn by light-horsemen.