noun

• The process of adapting something or becoming adapted to a situation; adjustment, modification.
• A change that is made or undergone to suit a condition or environment.
• The process of change that an organism undergoes to be better suited to its environment.
• An instance of an organism undergoing change, or the structure or behavior that is changed.
• The process of adapting an artistic work from a different medium.
• (authorship) An artistic work that has been adapted from a different medium.