mi·cro·far·ad (m??kr?-f?r??d, -?d)n. A unit of capacitance equal to one millionth (10-6) of a farad.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.microfarad (?ma?kr???fær?d) n (Units) one millionth of a farad; 10?6 farad. Symbol: ?F Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014mi?cro?far?ad (?ma? kr??fær ?d, -æd) n. a unit of capacitance, equal to one millionth of a farad. Abbr.: mf. [1870?75] Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.