direct currentn. Abbr. DC An electric current flowing in one direction only.American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.direct current n (General Physics) a continuous electric current that flows in one direction only, without substantial variation in magnitude. Abbreviation: DC Compare alternating current Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014direct? cur?rent n. an electric current of constant direction, having a magnitude that does not vary or varies only slightly. Abbr.: DC Compare alternating current. [1885?90] di?rect?-cur?rent, adj. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.di·rect current (d?-r?kt?) An electric current flowing in one direction only, as in a battery. Compare alternating current. See Notes at current, Tesla.The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.direct currentAn electric current that always flows in the same direction.Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited