a. Obsolete a young nobleman or gentleman
b. Us in 18th-cent. America, a man of property
Webster’s New World College Dictionary, Fourth Edition, compiled by the
editors of Webster’s New World Dictionaries. Copyright © 2010 by Houghton
Mifflin Harcourt. Published by Houghton Mifflin Harcourt. All rights reserved.
Word origin of 'younker'
< jong, young
lord, gentleman; akin to Ger junker, Junker