observation (observations plural )
1 n-uncount Observation is the action or process of carefully watching someone or something.
...careful observation of the movement of the planets...
2 n-count An observation is something that you have learned by seeing or watching something and thinking about it.
This book contains observations about the causes of addictions.
3 n-count If a person makes an observation, they make a comment about something or someone, usually as a result of watching how they behave.
`You're an obstinate man,' she said. `Is that a criticism,' I said, `or just an observation?'.
4 n-uncount Observation is the ability to pay a lot of attention to things and to notice more about them than most people do.
She has good powers of observation.