This is the 5293rd most frequent Russian word.
омичей
The word "омичей" refers to the plural form of "омич," meaning residents or people of Omsk (a city in Russia).
In this sentence, 'омичей' means 'Residents of Omsk,' referring collectively to the citizens of Omsk.
Омичи гордятся своей культурой.
Residents of Omsk are proud of their culture.
Here, 'омичей' specifies a group of people from Omsk whom the speaker encountered.
Мы встретили группу омичей в музее.
We met a group of Omsk residents in the museum.
In this example, 'омичей' refers to the subjects of the stories, indicating people from Omsk.