"huge, immense, gigantic," 1728, from Brobdingnag + -ian.
Entries linking to brobdingnagian
Brobdingnag
1727, Swift's name in "Gulliver's Travels" for an imaginary country where everything was on a gigantic scale. Not *brobdignag.
-ian
variant of suffix -an (q.v.), with connective -i-. From Latin -ianus, in which the -i- originally was from the stem of the word being attached but later came to be felt as connective. In Middle English frequently it was -ien, via French.