Talmudist and controversialist; lived at Narbonne in the second half of the thirteenth century. He was a disciple of Nathan ben Me�r of Trinquetaille, and a contemporary of Na?manides, with whom he maintained a scientific correspondence. Me�r enjoyed a high reputation as a commentator. Asher ben David invokes his authority in his (Asher's) commentary on the thirteen attributes (); and the anonymous commentator on the Targum On?los highly praises Me�r in his "Patshegen."
Me�r was the author of a controversial work entitled "Mil?emet Mi?wah" (Parma MSS. No. 2749). It is divided into five parts: (1) an account of a religious disputation held in 1245 before the bishop En Guillem de la Broa and in the presence of the Jewish notables of Narbonne and Capestang; (2) controversies with Christian ecclesiastics; (3) conversations of an apologetic nature, and explanations of Biblical passages concerning the Messiah and of Talmudical haggadot interpreted by Christians in favor of their belief; (4) commentary on the "Shema'" and on the thirteen attributes of God; and (5) letter on the "Sefer ha-Ba?r," which work Me�r declares to be a forgery.
Another work by Me�r, entitled "Meshib Nefesh," defending the first chapter of Maimonides' "Yad ha-?az??ah" against the attacks of an anonymous writer, is also extant in manuscript (MS. Ginzburg, No. 572, 10).
According to Neubauer ("Isr. Letterbode," 3:57), Me�r is identical with the Me�r ben Simeon mentioned in a Talmudical compilation (Neubauer, "Cat. Bodl. Hebr. MSS." No. 1558, 2, � 665) and in other works, where he is sometimes called "HaMe'"