de Beauvoir, Simonede Beau‧voir, Si‧mone /də ˈbəʊvwɑː, siːˈmaʊn $ boʊˈvwɑːr, siːˈmoʊn/(1908–86) a French writer, thought by some to be the mother of feminist writing. She had a relationship with the philosopher and writer Jean-Paul sartre which lasted until Sartre died in 1980.