1. starting points or standards used for comparison or measurement
2. the lines marking the boundaries of a court or field in various sports
Usage: sports
3. initial measurements or data collected before beginning a study or treatment
Usage: research; medical

Examples

• The researchers established baselines before testing the new medication.
• We need to set clear baselines for measuring student progress.
• The tennis player stayed behind the baselines during the serve.
• The study compared results to the original baselines from last year.
• Basketball players must not step on the baselines when inbounding the ball.
• The company’s performance baselines help track quarterly improvements.