fiqh (f?k, f?k)n. Islam The interpretation and elucidation of Islamic law.[Arabic fiqh, understanding, comprehension, fiqh, from faqiha, to understand, comprehend.]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.fiqh (fi?k) n (Islam) the study of the Islamic legal code [Arabic, literally: understanding]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014