Definition of "soupçon"

Henrietta, her niece, looked much prettier than she really was; she had good dark eyes, to which a soupçon of rouge, put on with such skill that few suspected it, gave all possible brightness.

1838 (date written), L[etitia] E[lizabeth] L[andon], chapter II, in Lady Anne Granard; or, Keeping up Appearances. […], volume I, London: Henry Colburn, […], published 1842, page 21

Eleanor returned the pressure of the other's hand with an infinitesimal soupçon of a squeeze.

1857, Anthony Trollope, Barchester Towers. […], copyright edition, volume II, Leipzig: Bernhard Tauchnitz, published 1859, page 259

[…] and as he spoke, there was just a soupçon of foreign accent in the pronunciation of the French vowels, a certain drawl of o's and a's, that would have betrayed the Britisher to an observant ear.

1906, Baroness Orczy, chapter VI, in I Will Repay‎, London: Greening & Co, page 88

Anthony was playing with an ancient tennis-ball, and he bounced it carefully on the floor several times before he answered with a soupçon of acidity:“You're a little idiot, Geraldine.”

1922, F[rancis] Scott Fitzgerald, The Beautiful and Damned, New York, N.Y.: Charles Scribner’s Sons, book 1, page 92

There were times, during the first two years of the Biden presidency, when I came close to forgetting about it all: the taunts and the provocations; the incitements and the resentments; the disorchestrated reasoning; the verbal incontinence; the press conferences fueled by megalomania, vengeance, and a soupçon of hydroxychloroquine.

2023 December 8, Jennifer Senior, “What Will Happen to the American Psyche If Trump Is Reelected?”, in The Atlantic‎