Webster's Revised Unabridged Dictionary · 1913

Uhlan

Uhlan , noun

[German uhlan, Pol. ulan, hulan, from Turkish oglān a youth, lad; of Tartar origin.]

1.
One of a certain description of militia among the Tartars.
2.
(Military) One of a kind of light cavalry of Tartaric origin, first introduced into European armies in Poland. They are armed with lances, pistols, and sabers, and are employed chiefly as skirmishers.