0 present participle of observe
1 to watch carefully the way something happens or the way someone does something, especially in order to learn more about it:
[ + question word ] The guards failed to observe who delivered the package.
[ + that ] In all these films one observes that directors are taking a new interest in Native American culture.
[ + infinitive without to ] A teacher observed her climb over the gate.
3 to make a remark about something:
[ + speech ] "I've always found German cars very reliable," he observed.
[ + that ] She observed that it would soon be time to stop for lunch.
In Istanbul, East and West fuse together in a way that is fascinating to observe.
The satellite will observe objects that are particularly interesting astronomically.
Some scientists believe that there is about ten times as much matter in the universe as astronomers have observed.
The research project has been observing changes in the local population.
Security guards are able to observe the car park using CCTV.
Did you observe the make of the vehicle?
The inspectors observed some irregularities in his tax return.
Did you observe anything unusual about his appearance?