1. a game played between two teams of nine players each on a field with four bases arranged in a diamond
2. the ball used in the game of baseball

Examples

• We played baseball at the park yesterday.
• Baseball is America’s national pastime.
• The pitcher threw the baseball over home plate.
• She caught the baseball with her glove.
• The baseball season runs from spring to fall.
• He hit the baseball out of the park for a home run.
• The baseball was signed by the entire team.