Refers to the main evening meal, often in a Western-style or formal context. Can also imply a dinner party or dining out.
今夜はホテルでディナーを予約した。
I reserved dinner at the hotel tonight.
Let's go see a movie after dinner.
I invited her to dinner.
I made a dinner reservation at the restaurant.
We enjoyed dinner while looking at the night view.
We went out for dinner at a fancy restaurant for our anniversary.
dinnertime; dinner time