/ Dictionary / Index A ampere-hour: Meaning and Definition of Find definitions for: am•pere-hour Pronunciation: (am'pēr-ouur', -ou'ur, am-pēr'-), [key] — n. Elect. a unit of electric charge noting the amount of electricity transferred by a current of one ampere in one hour, equal to 3600 coulombs. Abbr.: Ah, amp-hr, amp. hr. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ampere-hour (Thesaurus) ampere Ampère's law Related Content Daily Word Quiz: pallid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language