Home of the Noldor in Eriador during the Second Age, described as the “city of the Elves” (S/286) and translated by Christopher Tolkien as “Fortress of the Eldar” (SI/Ost-in-Edhil). This name is a combination of ost “fortress, city”, the plural in of the definite article i and the plural of Edhel “Elf” (SA/os(t), edhel).
place name. Fortress of the Eldar
Word Gloss ost “fort, fortress, stronghold, citadel; fortified town; enclosure, fort, fortress, stronghold, citadel; (fortified) town, [N.] city; [orig.] [S.] enclosure, [G.] yard” i “the” Edhel “Elf”