voluntary

Definition (noun): (military) a person who freely enlists for service

Definition (noun): composition (often improvised) for a solo instrument (especially solo organ) and not a regular part of a religious service or musical performance

Definition (adjective): of your own free will or design; done by choice; not forced or compelled

Example: man is a voluntary agent

Definition (adjective): of your own free will or design; done by choice; not forced or compelled

Example: participation was voluntary

Definition (adjective): of your own free will or design; done by choice; not forced or compelled

Example: voluntary manslaughter

Definition (adjective): of your own free will or design; done by choice; not forced or compelled

Example: voluntary generosity in times of disaster

Definition (adjective): of your own free will or design; done by choice; not forced or compelled

Example: voluntary social workers

Definition (adjective): of your own free will or design; done by choice; not forced or compelled

Example: a voluntary confession

Definition (adjective): controlled by individual volition

Example: voluntary motions

Definition (adjective): controlled by individual volition

Example: voluntary muscles