multitudinous

Etymology

From (the stem of) Latin multitūdō + -ous.

adj

1. Existing in great numbers; innumerable.
   1876, John Quincy Adams, Diary entry dated 9 September, 1833 in Charles Francis Adams (editor), Memoirs of John Quincy Adams, Philadelphia: J.B. Lippincott, Volume 9, p. 14, In the multitudinous whimseys of a disabled mind and body, the thick-coming fancies often occur to me that the events which affect my life and adventures are specially shaped to disappoint my purposes.
2. Comprising a large number of parts.
   1625, Peter Heylin, Mikrokosmos: A Little Description of the Great World, Augmented and revised, Oxford, “The Grecian Iles,” p. 424, […] he feared no enemies but the Sea and the Earth; the one yeelding no safe harbour for such a Navie; the other not yeelding sufficient sustenance for so multitudinous an Armie.
   […] looking up a long while at the grand high roof with its graceful and multitudinous work of iron rods, angles, gray colors, plays of light and shade, receding into dim outlines […] 1882, Walt Whitman, Specimen Days & Collect, Philadelphia: Rees Welsh & Co., entry dated 26 August, 1879, p. 138
   The monotone of the rain is beautiful, / And the sudden rise and slow relapse / Of the long multitudinous rain. 1916, Carl Sandburg, “Monotone”, in Chicago Poems, New York: Henry Holt & Co, page 118
3. Crowded with many people.
   The transport of a fierce and monstrous gladness / Spread thro’ the multitudinous streets, fast flying / Upon the winds of fear […] 1818, Percy Bysshe Shelley, The Revolt of Islam, London: C. & J. Ollier, Canto 12, Stanza I, p. 250
   In multitudinous London the memory of A. V. Laider and his trouble had soon passed from my mind. 1919, Max Beerbohm, “A. V. Laider”, in Seven Men, London: William Heinemann, page 142
4. Coming from or produced by a large number of beings or objects.
   […] she paused before she opened the doors of the salon, for a loud and confused noise came from within. It was of a kind that she had never heard before, so happy it was, so multitudinous, so abandoned—the sound of voices at play. 1950, Mervyn Peake, chapter 36, in Gormenghast, New York: Ballantine, published 1968, page 261
5. (obsolete) Of or relating to the multitude, of the common people.