Maurice Grevisse (French: [mɔʁis ɡʁevis];[1] 7 October 1895 – 4 July 1980) was a Belgian grammarian.

Born in Rulles, a small village in the province of Luxembourg, Belgium, Grevisse at a young age broke with a family tradition of working as blacksmiths by deciding to become a school teacher.

As a schoolteacher turned professor, Grevisse realized that existing grammar guides did not answer the needs of his teaching.

After his death, his son-in-law André Goosse, born in 1926 and also a grammarian, continued to revise Le Bon Usage, which is currently in its 16th edition.

Besides Le Bon Usage, Grevisse published several school and reference books dealing with difficulties in French: