Definition of "austerity"

The most rigid and noted of the English ladies resident in the French capital acknowledged and countenanced her; the virtuous Lady Elderbury, the severe Lady Rockminster, the venerable Countess of Southdown—people, in a word, renowned for austerity, and of quite a dazzling moral purity:—so great and beneficent an influence had the possession of ten (some said twenty) thousand a year exercised upon Lady Clavering’s character and reputation

1848 November – 1850 December, William Makepeace Thackeray, chapter 23, in The History of Pendennis. […], volumes (please specify |volume=I or II), London: Bradbury and Evans, […], published 1849–1850

The war-torn first half of the 20th century, together with the railway grouping of 1923, ushered in further austerity in design.

2021 October 20, Dr Joseph Brennan, “A key part of our diverse railway heritage”, in RAIL, number 942, page 56

He said France clearly wanted to "close one page and open another". He reiterated his opposition to austerity alone as the only way out of Europe's crisis: "My final duty, and I know I'm being watched from beyond our borders, is to put Europe back on the path of growth and employment."

2012 April 23, Angelique Chrisafis, “François Hollande on top but far right scores record result in French election”, in the Guardian‎