Ampere (Amp) Quantitative unit of measurement of electrical current. Abbreviated as amp or A. Devices are commonly rated by how many amps it requires for normal operations. By Jim Minadeo|2024-08-14T09:19:25-04:0004/01/21|Glossary| Share This Story, Choose Your Platform! FacebookXRedditLinkedInWhatsAppTelegramTumblrPinterestVkXingEmail About the Author: Jim Minadeo