Definition of "trivial"

"All which details, I have no doubt, Jones, who reads this book at his Club, will pronounce to be excessively foolish, trivial, twaddling, and ultra-sentimental."

1847 January – 1848 July, William Makepeace Thackeray, chapter 16, in Vanity Fair […], London: Bradbury and Evans […], published 1848

In fact, the influence of signage in a certain area may exist anywhere on a continuum from profoundly effective to utterly trivial or completely insignificant, irrespective of the intent motivating the signs.

2019, Li Huang, James Lambert, “Another Arrow for the Quiver: A New Methodology for Multilingual Researchers”, in Journal of Multilingual and Multicultural Development, page 11

As a scholar, meantime, he was trivial, and incapable of labour.

1842, Thomas De Quincey, “Cicero”, in Blackwood's Edinburgh Magazine

Tryuyals, & quatryuyals, ſo ſore now they appayreThat Parrot the Popagay, hath pytye to beholdeHow the reſt of good lernyng, is roufled vp & trold

c. 1521, John Skelton, Speke Parott

St. Edmund was bred in this University in the Trivials and Quadrivials till he was Professor of Arts

1691, [Anthony Wood], Athenæ Oxonienses. An Exact History of All the Writers and Bishops who have had Their Education in the Most Ancient and Famous University of Oxford from the Fifteenth Year of King Henry the Seventh, Dom. 1500, to the End of the Year 1690. […], volumes (please specify |volume=I or II), London: […] Tho[mas] Bennet […]