1. based on or involving careful watching and noting of facts or events
2. relating to the act of observing or watching

Examples

• The scientist conducted an observational study of bird migration patterns.
• Her observational skills helped her notice details others missed.
• The documentary used observational techniques to capture real-life moments.
• Observational data showed a clear trend in temperature changes.
• The teacher praised the student’s observational drawing of the plant.
• Observational astronomy relies on telescopes to study distant stars.
• The researcher preferred observational methods over controlled experiments.