do-si-do (d??s?-d??)n. pl. do-si-dos 1. A movement in square dancing in which two dancers approach each other and circle back to back, then return to their original positions.2. The call given to signal such a movement.[Alteration of French dos à dos, back to back : dos, back (from Old French; see dossier) + à, to; see black-a-vised.]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.do-si-do (?d??s??d??) n (Dancing) a square-dance figure in which dancers pass each other with right shoulders close or touching and circle back to backsentence substitute (Dancing) a call instructing dancers to perform such a figure Also called: dos-à-dos [C20: from dos-à-dos]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014do-si-do (?do? si?do?) n., pl. -dos. n. a figure in square dancing, in which two persons advance, pass around each other back to back, and return to their places. [