"夕食" means "dinner" or "evening meal," the last meal of the day, typically eaten in the evening. It's the standard term for the evening meal. In casual speech, it can be shortened to "晩ごはん."

一日の最後の食事である「晩ごはん」を指す言葉です。夕方に食べる食事のことです。日常会話では「晩ごはん」もよく使われます。