This is the 972nd most frequent Russian word.
учреждений
"Institutions" or "establishments."
Here, 'учреждений' again is in the genitive plural form, used to denote 'of the institutions', showing that these institutions possess or are associated with the employees taking part in the meeting.
Сотрудники учреждений приняли участие в совещании.
The employees of the institutions took part in the meeting.
In this context, 'учреждений' refers to all administrative institutions in the genitive plural case, illustrating 'of the city' relationship, indicating belonging or location.
На карте отмечены все административные учреждения города.
All administrative institutions of the city are marked on the map.
In this sentence, 'учреждений' is the genitive plural form of the noun 'учреждение', meaning 'institution'. It is used here to describe 'educational institutions', indicating possession or association in the context of the sentence.