Definition of "tournure"

Fortunately, your Parisian tournure will save your vivacity from vulgarity. Though, I must say, not one English girl in a thousand is to be trusted out of the security of insipidity; but you are French enough to be animated without being pert.

1838 (date written), L[etitia] E[lizabeth] L[andon], chapter III, in Lady Anne Granard; or, Keeping up Appearances. […], volume I, London: Henry Colburn, […], published 1842, page 25

Winterbourne stood looking after her; and as she moved away, drawing her muslin furbelows over the gravel, said to himself that she had the tournure of a princess.

1879, Henry James, Daisy Miller, London: Harper & Brothers

Voiture belonged to a race of poets essentially French, who sacrificed to the graces instead of the muses; to whom Cupid, with his wings and arrows, was the ideal of love, and whose art of poetry consisted in epigram, tournure, readiness, and facility.

1834, L[etitia] E[lizabeth] L[andon], chapter XXI, in Francesca Carrara. […], volume I, London: Richard Bentley, […], (successor to Henry Colburn), page 246