1. the quality of being dependable and consistently performing well or accurately
2. the degree to which a measurement, test, or research finding can be trusted to be accurate and consistent
Usage: technical; statistics

Examples

• The car’s reliability made it a popular choice among families.
• We questioned the reliability of the witness’s testimony.
• The company built its reputation on the reliability of its products.
• The reliability of the internet connection is crucial for remote work.
• Researchers tested the reliability of their survey instrument.
• His reliability as a friend has never been in doubt.
• The reliability of weather forecasts has improved significantly.