1. rotating devices with angled blades that push against air or water to move aircraft or boats forward

Examples

• The airplane’s propellers spun rapidly before takeoff.
• The boat’s twin propellers churned through the water.
• Ice had formed on the aircraft’s propellers during the storm.
• The mechanic inspected the propellers for damage.
• Small planes typically have two or four-blade propellers.
• The ship’s propellers were made of bronze to resist corrosion.