Curry—the dish of Indian origin, but in Japan usually refers to the Japanese-style curry made with roux; a spiced stew-like dish.
今日はカレーにしよう。ご飯と一緒に出す予定だ。
Let's have curry today. I plan to serve it with rice.
市販のカレールーを使えば簡単に作れる。
You can easily make it using store-bought curry roux.
彼は辛いカレーが好きで、いつも大盛りにする。
He likes spicy curry and always gets a large serving.
As an abbreviation, 'curry' often specifically means 'curry rice' (curry served with rice).
セットメニューのカレー（単に“カレー”と表記）が一番人気だ。
The curry on the set menu (simply listed as 'curry') is the most popular.
母の作るカレーは、いつもご飯と一緒だから“カレー”で通じる。
My mother's curry is always served with rice, so 'curry' is understood to mean curry rice.