Lewis Short
(adjective) : magnĭlŏquus, a, um, magnusloquor
* That speaks in a lofty style, sublime: Homerus, Stat. S. 5, 3, 62.
* In a bad sense, that speaks in a pompous style, magniloquent, vaunting, boastful: atque illi modo cauti ac sapientes, prompti post eventum ac magniloqui erant,Tac. Agr. 27: os,Ov. M. 8, 396; Mart. 2, 43, 2: lingua,Vulg. Psa. 12, 4: flatus,Stat. Th. 3, 192.
Charlton T. Lewis, Charles Short, A Latin Dictionary