デパートの

of the department store

→ デパート
phrase Rare #24,936
of the department store デパート means “department store,” and の connects it to a following noun to show possession or association. This phrase is normally incomplete by itself and is followed by a noun, such as デパートの前 (in front of the department store).
JA: デパートの前で友達と待ち合わせました。
EN: I met up with my friend in front of the department store.

大手デパートのいずれ売り上げを落とした

All of the major department stores saw their sales decline.

そのデパートの前に書店がある

There is a bookstore in front of that department store.

最初にデパートのバーゲンつきあってほしいんだけど

First, I'd like you to come with me to the department store sale.

かわいい系の小娘デパートの織物コーナーに行き店員尋ねた

A cute young girl went to the textiles section of a department store and asked a sales clerk.

初めはデパートのサンタ

At first, he was a department store Santa.

— アメリ (2001)

そのデパートの前に本屋があります

There is a bookstore in front of that department store.

さァデパートの食堂でも行くか

Well, shall we go to the department store cafeteria or something?

— 東京物語 (1953)

お前が私のデパートの-屋上から突き落とした犯人

Are you the one who pushed my grandchild off the rooftop of the department store?

— ブレット・トレイン (2022)