Definition of "diffidence"

Without scruple—without apology—without much apparent diffidence, Mr. Elton, the lover of Harriet, was professing himself her lover.

1815, Jane Austen, Emma, volume I, chapter 15

I have the same diffidence in my feelings that most public speakers have, and am apt to think that others can speak better and more edifying than I can.

1857, Brigham Young, Journal of Discources: Attention and Reflection Necessary to An Increase of Knowledge, etc.

"I was passing by," he began to stammer, trembling with his diffidence, "I—happened to be passing along this way, and so—er—as I was passing this way, I says to myself, says I, 'I'll just stop into the shop a minute.'

1897, José María de Pereda, translated by William Henry Bishop, Cleto's Proposal to Sotileza (an excerpt from Sotileza)

And Rick with unwonted diffidence had accepted his exclusion. Now with the same diffidence he came, looking trim and loving and mysteriously humble.

1986, John le Carré, A Perfect Spy

[Charles, King of France]: We have been guided by thee hitherto,And of thy cunning had no diffidence:One sudden foil shall never breed distrust.

1591 (date written), William Shakespeare, “The First Part of Henry the Sixt”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act III, scene iii]

[...] [H]ee had brought the Parliment into ſo juſt a diffidence of him, as that they durſt not leave the Public Armes to his diſpoſal [...]

1649, J[ohn] Milton, chapter XII, in ΕΙΚΟΝΟΚΛΆΣΤΗΣ [Eikonoklástēs] […], London: […] Matthew Simmons, […], page 122

I have no diffidence of your abilities—only be constant to one roguery at a time—

1777, Richard Brinsley Sheridan, The School for Scandal, V.Scene the Last