Definition of "tennis ball" []

• A bouncy ball designed for the sport of tennis. A rubber, hollow ball, pressurized and covered with felt. Most common color is "Optic Yellow", but many colors exist today. (noun)

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• "Thanas trapped the tennis ball in his hands and turned to glare at Spock."
• "His unswerving determination led him to an unusual and ultimately lucrative discovery—he invented the tennis ball canister that reconditions old and dead tennis balls and brings them back to life."
• "Thanas picked a purple tennis ball off the ground and tossed into the air above him as he lay in his bed."