tennis ball (noun)

1. In the anime, the protagonist always carries a tennis ball to relieve stress and practice hand-eye coordination.

2. The sleek and modern living room design features a unique accent wall made entirely of tennis balls.

3. The eerie abandoned house was filled with tennis balls, creating a creepy atmosphere that sent shivers down our spines.

4. In the futuristic world of the science fiction novel, tennis balls have evolved to be autonomous floating objects used in intergalactic sports.