Lunch; the midday meal, often called 'hirugohan' or 'lunch' in conversation.
昼ご飯は駅前のカフェでサンドイッチを食べた。
I had a sandwich for lunch at the cafe in front of the station.
昼ご飯を食べながら会議の資料を見た。
I looked over the meeting materials while eating lunch.
今日は友達と一緒に昼ご飯を食べに行く予定だ。
I'm planning to go eat lunch with a friend today.