Definition of "chinlessness"

Everyone has read of his beetling brows, his prominent teeth, his chinlessness, his hairiness, and has seen them reproduced in pictures, even in bronze busts.

1985, Courtlandt Canby, Nancy E. Gross, The World of history, page 65

On the Tuesday after Miss Pettigrew's funderal Mr. Conrad Rackley returned to Neely in a rented truck thecab of which he shared with a pair of Masseys who we did not know for Masseys right off but who we recognized as relations on account of a common chinlessness, which is apparently the predominant Massey trait in the West Virginia end of Kentucky.

1987, Charles East, The New Writers of the South: A Fiction Anthology, page 176

Patriarchy deliberately inculcates rivalry between women; Eva speaks of this in her description of the mean-spirited rivalries between girls in the cotillion competition which her chinlessness had locked her out of.

2000, Meredith A. Powers, The Heroine in Western Literature