/ Dictionary / Index H host computer: Meaning and Definition of Find definitions for: host' comput"er Pronunciation: [key] the main computer in a network: controls or performs certain functions for other computers. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hostage hostel Related Content Daily Word Quiz: ablution Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language