/ Dictionary / Index H humidify: Meaning and Definition of Find definitions for: hu•mid•i•fy Pronunciation: (hy-mid'u-fī" or, often, y-), [key] — -fied, -fy•ing. to make humid. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: humidify (Thesaurus) humidifier humidistat Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language