In reference to the conflict between the U.S. and Great Britain, so called in U.S. by 1815.
c. 1300, mageste, "greatness or grandeur of exalted rank or character, imposing loftiness, stateliness, qualities appropriate to rulership," from Old French majeste "grandeur, nobility" (12c.), from Latin maiestatem (nominative maiestas) "greatness, dignity, elevation, honor, excellence," from stem of maior (neuter maius), comparative of magnus "great, large, big" (of size), "abundant" (of quantity), "great, considerable" (of value), "strong, powerful" (of force); of persons, "elder, aged," also, figuratively, "great, mighty, grand, important," from suffixed form of PIE root *meg- "great."
Earliest English use is with reference to God or Christ; as a title of address or dignity to kings and queens (late 14c.), it is from Romance languages and originated in the Roman Empire.
title applied to an adept in Brahmanism, literally "great-souled," from Sanskrit mahatman, from maha "great" (from PIE root *meg- "great") + atman, "soul, principle of life," properly "breath" (see atman). In esoteric Buddhism, "a person of supernatural powers." In common use, as a title, a mark of love and respect. Said to have been applied to Gandhi (1869-1948) in 1915, perhaps by poet Rabrindranath Tagore. The earliest use of the word in English, however, is among the theosophists, who applied it to certain imaginary beings with preternatural powers (1884).
on the Great Seal of the United States of America, apparently an allusion to line 5 of Virgil's "Eclogue IV," in an 18c. edition: Magnus ab integro seclorum nascitur ordo "The great series of ages begins anew." The seal's designer, Charles Thomson, wrote that the words "signify the beginnings of the New American Era." (see Annuit Coeptis).
in reference to solid-fuel rockets (1809) or matches (1839), a reference to English inventor Sir William Congreve (1772-1828), who learned the tactic of rocket warfare while serving in India. He was a descendant of the family of William Congreve the Restoration playwright (1670-1729), being probably his great-great-nephew.
early 15c., "to curl up in a ball, to gather into a lump" (implied in lumped), from lump (n.). Transitive meaning "to put together in one mass or group" is from 1620s. Related: Lumped; lumping (from 1705 as a slang present-participle adjective meaning "great, big"):
LUMPING. Great. A lumping pennyworth; a great quantity for the money, a bargain. He has got a lumping pennyworth; frequently said of a man who marries a fat woman. [Grose, "Classical Dictionary of the Vulgar Tongue," 3rd edition, 1796]
"lofty or ambitious in expression," 1650s, a back-formation from magniloquence, or else from Latin magniloquentia "lofty style of language," from magniloquus "pompous in talk, vaunting, boastful," from combining form of magnus "great" (from PIE root *meg- "great") + -loquus "speaking," from loqui "to speak" (from PIE root *tolkw- "to speak"). Related: Magniloquently.