noun
Usage: usually capitalized I
Etymology: indian (II) 2
1. : a period of warm or mild weather late in autumn or in early winter usually characterized by a clear or cloudless sky and by a hazy or smoky appearance of the atmosphere especially near the horizon
2. : a period of tranquillity or happiness or prosperity or other generally favorable conditions occurring for the first time or more usually anew toward the latter part or end of something
if the nineteen-twenties constituted a sort of Indian summer of the old order — F.L.Allen
life in the Indian summer of Czarist Russia — John Davenport
an Indian summer of wartime literature — Blackwood's
the Indian summer of her widowhood — Dixon Wecter