/ Dictionary / Index G gill box: Meaning and Definition of Find definitions for: gill' box" Pronunciation: (gil), [key] — Textiles. Textiles. a machine having a number of gills, used in combing. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. gill book gill cleft Related Content Daily Word Quiz: mamba Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language