「晩ご飯」 (bangohan) means "dinner." It refers to the evening meal, often the main meal of the day. This phrase is used when discussing evening meals with family or friends. 「今日の晩ご飯はカレーです。」 (Tonight's dinner is curry.)

夜(よる)に食(た)べる食事(しょくじ)のことです。一日(いちにち)の最後(さいご)の食事(しょくじ)です。