Definition of "gamine"

In her navy linen trousers and her, perhaps too tight, white jersey, Jennifer was determinedly gamine.

1984, Anita Brookner, Hotel du Lac, Penguin, published 2016, page 54

It’s a wildly dated-looking and derivative film, a quaint adventure in fantasised naughtiness, like Ozon’s teen prostitute fantasy Jeune et Jolie in 2013, which starred his lead actress here, Marine Vacth, in a similarly gamine role.

2017 May 25, Peter Bradshaw, “L'Amant Double review – camp-classic status beckons for François Ozon's softcore silliness”, in The Guardian‎