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History
History
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Meaning:
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the act, state, of observing or being observed; the power of noticing carefully

attention, scrutiny

conclusion consideration examination experience information inspection investigation knowledge measurement note perception remark research review study surveillance view check cognition cognizance detection estimation heedfulness mark mind monitoring notice once-over overlook probe regard search supervision watching ascertainment noticing recognizing
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Cases of word usage

1) relying on observation and experiment, not on theory (empirical)

2) academic subjects, areas of study, in which exact measurement, observation and calculation are used (science)

3) an opportunity; a range of action or observation (scope)

OBSERVATION as in Wiktionary
OBSERVATION as in Wikipedia