This is the 3268th most frequent Russian word.
определенный
"Определенный" means "definite" or "specific."
In this use, 'определенный' is employed to describe an unspecified but distinct quality or characteristic.
У него определенный талант в рисовании.
He has a certain talent for drawing.
Here, 'определенный' signifies particular or distinct attributes that help narrow the search.
Я ищу книгу с определенными критериями.
I am looking for a book with specific criteria.
In this instance, 'определенное' is used to denote focused and deliberate planning that is required.