Kaa·ba (kä?b?)n. A Muslim shrine in Mecca toward which the faithful turn to pray.[Arabic ka’ba, cube, cubic structure, from ka’aba, to swell, be full (said of breasts); see k?b in Semitic roots.]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.Kaaba (?k??b?) or Caaban (Islam) a cube-shaped building in Mecca, the most sacred Muslim pilgrim shrine, into which is built the black stone believed to have been given by Gabriel to Abraham. Muslims turn in its direction when praying[from Arabic ka`bah, from ka`b cube]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014