/ Dictionary / Index R rainband: Meaning and Definition of Find definitions for: rain•band Pronunciation: (rān'band"), [key] — n. a dark band in the solar spectrum caused by water vapor in the atmosphere. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. rain rainbird Related Content Daily Word Quiz: placid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language