[noun] - a very short timeIn the four-billion-year history of life, 100 000 years is a twinkling.The peace ended in Yugoslavia and elsewhere in Europe when communist rule vanished in a twinkling.Microprocessors do the calculations in the twinkling of an eye (= very quickly).
TWINKLING
Meaning of TWINKLING in English
Cambridge English vocab. Кембриджский английский словарь. 2012