observer
What is the Definition of observer?
Noun:
- a person who becomes aware (of things or events)
- an expert who observes and comments on something
How can I use observer in a sentence?
The observer noted every detail during the experiment. - Наблюдатель отметил каждую деталь во время эксперимента.
The observer noted every detail. - Наблюдатель отметил каждую деталь.