two-a-day I. \| ̷ ̷ ̷ ̷| ̷ ̷\adjective 1.: used or presented twice a day < a two-a-day theatrical attraction > 2.: presenting an entire vaudeville bill twice daily < a two-a-day house > II. noun Etymology:two-a-day (I) : something used or presented twice daily; especially: a vaudeville show with two performances daily