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Synonyms
ob·ser·va·tion (ŏb́zər-vā́shən)

noun 

    1. The act or faculty of observing.
    2. The fact of being observed.
    1. The act of noting and recording something, such as a phenomenon, with instruments.
    2. The result or record of such notation: a meteorological observation.
  3. A comment or remark. See synonyms at comment
  4. An inference or a judgment that is acquired from or based on observing.

derivatives

ob́ser·vátion·al
adjective
ob́ser·vátion·al·ly
adverb