observation (noun)
1: the act of making and recording a measurement
2: the act of observing; taking a patient look [syn: observance, watching]
3: facts learned by observing; "he reported his observations to the mayor"
4: the act of noticing or paying attention; "he escaped the notice of the police" [syn: notice, observance]
5: a remark expressing careful consideration [syn: reflection, reflexion]