This is the 7770th most frequent Russian word.
ильичевского
"Iльичевского" is a possessive adjective meaning "of Ilyichev" or "related to Ilyichev," derived from the name "Ilyichev."
Here, 'ильичевского' refers to a period or style associated with Ilyichevsky culture.
В библиотеке представлены книги Ильичевского периода.
The library contains books from the Ilyichevsky period.
In this sentence, 'ильичевского' is used as an adjective to describe a specific district.
Эта улица находится в Ильичевском районе.
This street is located in the Ilyichevsky district.
Here, 'ильичевского' refers to the author Ilyichevsky as possessive form indicating authorship.