/ Dictionary / Index H hair space: Meaning and Definition of Find definitions for: hair' space" Pronunciation: [key] — Print. Print. the thinnest metal space used to separate words, symbols, etc. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hair shirt hairsplitting Related Content Daily Word Quiz: sequester Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language