adobustle, fuss; flurry; confusion; turmoil; commotion: much ado about nothingNot to be confused with:adieu ? good-bye; farewell; the act of leaving: He bade his friends adieu.Abused, Confused, & Misused Words by Mary Embree Copyright © 2007, 2013 by Mary Embreea·do (?-do?o?)n. Fuss; trouble; bother.[Middle English, from the phrase at do : at, to (used with infinitive) (from Old Norse at; see ad- in Indo-European roots) + do, do; see do1.]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.ado (??du?) nbustling activity; fuss; bother; delay (esp in the phrases without more ado, with much ado)[C14: from the phrase at do a to-do, from Old Norse at to (marking the infinitive) + do1]ADO abbreviation for (Industrial Relations & HR Terms) accumulated day off Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014a?do (??du) n. busy or delaying activity; bustle; fuss. [1250?1300; Middle English (north) at do=at to (