/ Dictionary / Index M mobile unit: Meaning and Definition of Find definitions for: mo'bile u"nit Pronunciation: [key] a vehicle supplied with the basic equipment or materials necessary for a particular purpose, as for televising on location or being used as an x-ray or inoculation clinic. a transceiver in a vehicle or carried by a person. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. mobile phone mobility Related Content Daily Word Quiz: penury Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language