Definition of "peculiarity"

“'There is always a moment when the familiar becomes the strange,'” Cora recited, as she stood looking around at the bustling open docking area of Tamayo Point. “'Look at your own hand and you will eventually notice the variation of textures, the growth of nails and the fade of scars, the peculiarity of having five fingers instead of three.'”

2017 November, N. K. Jemisin, Mac Walters, chapter 1, in Mass Effect Andromeda: Initiation‎, 1st edition (Science Fiction), Titan Books, page 9

I had often heard of Miss Marchmont, and of her peculiarities (she had the character of being very eccentric), but till now had never seen her.

1853, Charlotte Brontë, chapter 4, in Villette

I thought Alice and H. J. P. would have fainted at the full spectacle; but we are fast getting used to the little peculiarities of foreigners and I trust they will forgive us many sins in return.

1870, Louisa May Alcott, quoted in 2011, Daniel Shealy, Little Women Abroad: The Alcott Sisters' Letters from Europe, 1870-1871

The peculiarity of this invention consists in a means for varying the angle at which the plaiting-blade is held in the plaiter without varying the position of the entire instrument upon the sewing-machine.

1873, Specifications and Drawings of Patents Issued from the U.S. Patent Office