matutinal UK /məˈtjuː.tɪ.nl̩US /məˈt(j)utɪnl̩/ adjective2 •(formal, literary) Of, occurring in, or relating to the morning, especially the early morning upon waking up.'Top 'o the mornin' to ye!' he called to Flory in a hearty matutinal voice, putting on an Irish accent. — 1934 •(formal, literary) Active in the morning; waking up early.Pen, putting on his hat, strode forth into the air, and almost over the body of the matutinal housemaid, who was rubbing the steps at the door. — 1848