This is the 15105th most frequent Turkish word.
seçimidir
"Seçimidir" means "is [his/her/its/their] choice" in English.
Here, 'seçimidir' refers to the noun 'seçim' (choice) being a possessive form indicating that something belongs to us.
Hayatta sahip olduğumuz her şey bizim seçimimizdir.
Everything we have in life is our choice.
In this sentence, 'seçimidir' emphasizes the personal decision or choice of an individual.
Eğitim almak bireysel bir seçimidir.
Getting an education is an individual choice.
'Seçimidir' here stresses the decisive aspect of choosing a profession as a significant event for a person.