This is the 14151st most frequent Turkish word.
müdürleri
"Managers" or "directors" (plural form).
The word 'müdürleri' here refers to the plural form of 'the principals' of the school, in possessive case where it links to 'the school's'.
Okulun müdürleri toplantıya katıldı.
The school's principals attended the meeting.
In this sentence, 'müdürleri' is the plural object of the action 'to meet', referring to multiple principals.
Müdürleri tanımak için okula gittik.
We went to the school to meet the principals.
Here, 'müdürleri' is used as the plural possessive term indicating 'the new principals' as the topic of the sentence.