nounThe American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
- The period during which it is legal to hunt or catch game or fish.
- Informal A time of unrestrained harassment, criticism, or attack: “By 1950 it was open season on Communists and their fellow travelers” (Boston).