observation

(noun) the act of making and recording a measurement.

(noun) the act of observing; taking a patient look. Synonyms: observance, watching.

(noun) a remark expressing careful consideration. Synonyms: reflection, reflexion.

(noun) facts learned by observing. Example: "He reported his observations to the mayor."

(noun) the act of noticing or paying attention. Synonyms: notice, observance. Example: "He escaped the notice of the police."