What does the word spontaneity mean?

Usage examples for spontaneity

  1. With which, however, as he simply met this spontaneity in a manner to show that he had often had it from young persons of her race, and that he was familiar even with the possibilities of their familiarity, she felt her freedom rendered vain by his silence, and she immediately tried to think of the most reasonable thing she could say. – The Wings of the Dove, Volume 1 of 2 by Henry James
  2. A current of bold spontaneity has passed through here. – The French Impressionists (1860-1900) by Camille Mauclair
  3. Guests came to the house, and Bert addressed his wife with some faint spontaneity, and Nancy eagerly answered him. – Undertow by Kathleen Norris