spontaneous
used in Main Street

only 1 use

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Definition

behaving in an instinctive, uninhibited manner

or:

happening naturally (without planning or external force)

Carol's family were self-sufficient in their inventive life, with Christmas a rite full of surprises and tenderness, and "dressing-up parties" spontaneous and joyously absurd.
Chapter 1 (60% in)

There are no more uses of "spontaneous" in Main Street.

Typical Usage (best examples)