1. The state or quality of being fully grown or developed. 2. The state or quality of being mature. 3. The time at which a note or bond is due. 4. The state of a note or bond being due. 5. A stage in the development of streams or landscapes at which maximum development has been reached or at which the process of erosion is going on with maximum vigor. Maturity of a landscape continues throughout the period of maximum topographic differentiation or until about three fourths of the original mass is carried away by erosion.
