Alternating Current (AC) Electrical current that continually reverses direction, with this change in direction being expressed in Hertz, or cycles per second. By Jim Minadeo|2024-08-13T17:16:02-04:0004/01/21|Glossary| Share This Story, Choose Your Platform! FacebookXRedditLinkedInWhatsAppTelegramTumblrPinterestVkXingEmail About the Author: Jim Minadeo