1. Plural of oater; Western movies or television shows, especially those made in the early-to-mid 20th century.
Usage: informal; chiefly historical

Examples

• My grandfather loved watching old oaters on Saturday afternoons.
• The 1950s saw a boom in oaters on television.
• Classic oaters like those starring John Wayne remain popular today.
• She collected DVDs of vintage oaters from the golden age of Hollywood.
• Oaters typically featured cowboys, ranches, and frontier adventures.