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say it: ahb-zur-VAY-shuhn
observation is a noun meaning "the act of making and recording a measurement". It carries 5 recorded senses.
the act of making and recording a measurement
the act of observing; taking a patient look
a remark expressing careful consideration
facts learned by observing
“he reported his observations to the mayor”
the act of noticing or paying attention
“he escaped the notice of the police”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for observation come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.