do-si-do Syllabification: (do-si-do)Pronunciation: /ˌdō sē ˈdō/ (also dos-à-dos)Definition of do-si-do noun (plural do-si-dos) (in square dancing, and other country dancing) a figure in which two dancers pass around each other back to back and return to their original positions. verb [no object] dance a do-si-do. Origin: 1920s: alteration of dos-à-dosdo-si-do in other Oxford dictionaries Definition of do-si-do in the British & World English dictionary