1. A person who settled homestead land in the western United States before it was officially made available, in order to have first choice of location.
2. Sooner A native or resident of Oklahoma.

[From SOON.]

The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.