「朝ご飯」 (asagohan) means "breakfast." It specifically refers to the first meal of the day, eaten in the morning. This is a common phrase to talk about morning meals. 「毎朝、パンとコーヒーが朝ご飯です。」 (Every morning, bread and coffee are my breakfast.)

一日(いちにち)の最初(さいしょ)の食事(しょくじ)のことです。朝(あさ)に食(た)べるご飯(はん)です。