adjective. Happening or arising without apparent external cause; self-generated.

adjective. Arising from a natural inclination or impulse and not from forethought or prompting.

adjective. Unconstrained and unstudied in manner or behavior.

adjective. Growing without cultivation or human labor.

Proceeding from a conscious or unconscious internal impulse; occurring or done without the intervention of external causes; in a restricted sense, springing from one's own desire or volition, apart from any external suggestion or incitement.

Growing naturally, without previous human care.

Growing as native; indigenous.

In biology, instinctive or automatic, as some actions of animals which depend upon no external stimulus and are performed without apparent motive or purpose; uninfluenced by external conditions, as a change in structural character. Compare spontaneity, 2.

Synonyms Willing, etc. (see voluntary), instinctive, unbidden.

adjective. Proceeding from natural feeling, temperament, or disposition, or from a native internal proneness, readiness, or tendency, without constraint.

adjective. Proceeding from, or acting by, internal impulse, energy, or natural law, without external force

adjective. Produced without being planted, or without human labor.

adjective. combustion produced in a substance by the evolution of heat through the chemical action of its own elements; as, the spontaneous combustion of waste matter saturated with oil.

adjective. See under Generation.

adjective. Self generated; happening without any apparent external cause.

adjective. Done by one's own free choice, or without planning.

adjective. proceeding from natural feeling or native tendency without external constraint

adjective. arising from a momentary impulse

adjective. controlled and directed internally : self-active : spontaneous movement characteristic of living things

adjective. produced without being planted or without human labor : indigenous

adjective. not apparently contrived or manipulated : natural

adjective. Random.

adjective. Sudden, without warning.

adjective. said or done without having been planned or written in advance

adjective. happening or arising without apparent external cause

"Thus, the term spontaneous order may be used to refer strictly to voluntary orders — that is, forms of social coordination which emerge from the free actions of many different people, as opposed to coordination that arises from some people being forced to do what other people tell them to do."

labored  

automatic  center of spontaneous rotation  extemporaneous  intentional  spontaneous axis  

impulsive  instinctive  intuitive  natural  unprompted  

spontaneous combustion  

spontaneity  spontaneously  spontaneousness  

contemporaneous  extraneous  miscellaneous  percutaneous  simultaneous  

instinctive  involuntary  natural  poetic  sincere  

ad lib  arbitrary  automated  automatic  automatous