observe

1. (transitive) To notice or view, especially carefully or with attention to detail.Examples: "From this vantage point we can observe the behavior of the animals in their natural habitat."; "She got up before dawn to observe the lunar eclipse."; "“One horse?” interjected Holmes. ¶ “Yes, only one.” ¶ “Did you observe the colour?”"transitive

2. (transitive) To follow or obey the custom, practice, or rules (especially of a religion).Examples: "Please observe all posted speed limits."; "Some of them have, in fact, given them a theoretical elaboration which for subtlety, refinement, and elegance need make no apologies to the older economics, and which remains faithful to older theorizing in at least one respect, that the tradition of unintelligibility to the layman is scrupulously observed."; "A sell-out crowd of 10,000 then observed perfectly a period of silence before the team revealed their black armbands, complete with stitched-in poppies, for the match. After Fifa’s about-turn, it must have been a frantic few days for the England kit manufacturer. The on-field challenge was altogether more straightforward."Synonyms: celebratetransitive

3. (transitive) To take note of and celebrate (a holiday or similar occurrence), to keep; to follow (a type of time or calendar reckoning).Examples: "Ye shall observe the feast of unleavened bread."; "On Sunday, most of Canada will observe daylight time and spring forward an hour in order to reflect the increasing sunlight."transitive

4. (intransitive) To comment on something; to make an observation.Examples: "The senator observed that the bill would be detrimental to his constituents."; "Elbows almost touching they leaned at ease, idly reading the almost obliterated lines engraved there. ¶ "I never understood it," she observed, lightly scornful. "What occult meaning has a sun-dial for the spooney? I'm sure I don't want to read riddles in a strange gentleman's optics.""intransitive