/ Dictionary / Index D dial-up: Meaning and Definition of Find definitions for: di•al-up Pronunciation: (dī'ul-up", dīl'-), [key] — adj. Computers. of or pertaining to a terminal that links to a computer by dialing a telephone number. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. dial train dialysis Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language