noun

observation

ahb-zur-VAY-shuhn/ˌɑːbzərˈveɪʃn/

The act of carefully watching or examining something.

The man's careful observation reveals the snail's extended tentacles through the magnifier.

A man closely watches a snail crawling along a leaf, using a magnifying glass to examine its extended tentacles.

Etymology

obLatinbefore, in front of

+servLatinto watch, keep safe

+ationLatinact or process

The underlying image is watching over something or keeping it safe. This developed into paying careful attention, and an observation could then mean a remark arising from what someone noticed.

In context

Sleep History15:37

a moment for quiet observation. Before work truly begins, many villagers glance toward the sky. Not simply to judge the weather. They are watching for signs.

The TERRIFYING History of MEDIEVAL Bad Omens | Sleep History

More examples

We learn about bird behavior through quiet observation.
The scientist records her observations in a notebook.
His observation about the slippery steps prompts us to walk carefully.

Forms

observation · observations

observe verb — To watch or examine something carefully.

observational adjective — Based on careful watching or examination.

Similar words

monitoring: Monitoring usually involves tracking changes or conditions over time.
inspection: Inspection focuses on checking something for defects or compliance.
scrutiny: Scrutiny suggests especially close examination, often with critical attention.