/ Dictionary / Index M movable-do system: Meaning and Definition of Find definitions for: mov'a•ble-do' sys"tem Pronunciation: (m'vu-bul-dō'), [key] — Music. Music. a system of solmization in which the syllable do can be transposed to the tonic of any key. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. movable movable feast Related Content Daily Word Quiz: sylvan Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language