This is the 3916th most frequent Russian word.
гейдар
The Russian word "гейдар" does not have a standard definition; it is likely a proper noun, such as the name Heydar.
In this sentence, 'Гейдар' is used as a proper noun referring to a well-known figure.
Гейдар был знаменитым писателем в Азербайджане.
Heydar was a famous writer in Azerbaijan.
Here, 'гейдар' metaphorically refers to a prominent feature or personage in the artwork.
На картине изображён величественный гейдар в горах.
The painting depicts a majestic Heydar in the mountains.
In this context, the sentence discusses the general usage of 'гейдар' as a proper name.