Meaning of OBSERVATION in English

OBSERVATION

■ noun

1》 the action or process of closely observing or monitoring.

2》 the ability to notice significant details.

3》 the taking of the sun's or another celestial body's altitude to find a latitude or longitude.

4》 a comment based on something one has seen, heard, or noticed.

Derivatives

~al adjective

~ally adverb

Concise Oxford English vocab.      Сжатый оксфордский словарь английского языка.