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English definition of “observe”

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observe

verb  /əbˈzɜrv/ us  

observe verb (WATCH)

[T] to watch something or someone carefully: She spent her career observing animal behavior. [+ question word] On their field trip, the students observed how a newspaper was put together.

observe verb (NOTICE)

[T] to notice something or someone: [T] Jack observed a look of panic on his brother’s face.

observe verb (EXAMINE)

science [T] to study and record information about a scientific event

observe verb (REMARK)

[I] to remark about something: "It’s raining again," he observed.

observe verb (OBEY)

[T] to obey a law or rule, or celebrate a holiday or religious event in a traditional way: You must observe the law.
(Definition of observe from the Cambridge Academic Content Dictionary © Cambridge University Press)
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