The definition of mature refers to someone or something that is full grown or adult, either physically or in terms of behavior and attitude. An example of mature is someone who behaves appropriately and doesn't throw a temper tantrum if he doesn't get his way. An example of mature is a full grown plant. adjective.

stallion

Osteocytes.

erythrocytes

The simultaneous activity of osteoblasts and osteoclasts is what causes the reshaping of mature bone as it grows. Bones are defined as rigid organs.