Definitions
American Heritage® Dictionary of the English Language, Fourth Edition
- n. Informal A commotion or stir.
Century Dictionary and Cyclopedia
- n. Ado; bustle; fuss; commotion.
Wiktionary
- n. archaic Ado.
- n. A task that has been noted as one that must be completed, especially on a list.
- n. A fuss made over something, commotion.
GNU Webster's 1913
- n. colloq. Bustle; stir; commotion; ado.
WordNet 3.0
- n. a disorderly outburst or tumult
Etymologies
- From to + do, formed on analogy with ado, from at + do. (Wiktionary)
Examples
“She sends her husband Outlook reminders of things he needs to do, keeps short- and long-term to-do lists and color-codes the family calendar—a different-colored pen for each person.”
The Wall Street Journal: Can 'the Planner' and 'Winging It' Live Happily Ever After?
“An e-mail inbox has been described as a to-do list that anyone in the world can add to.”
The Washington Post: National, World & D.C. Area News and Headlines - The Washington Post
“Will you never cross those top three items off that urgent to-do list or catch up on messages and bills?”
“It's endless," Mr. Ulibarri says of his to-do list.”
The Wall Street Journal: A One-Horse Town Down to Two People
“For the past few months, this soft-spoken 51-year-old has added another task to his to-do list.”
“A timeline, in essence, that extends into the past but also the future with appointments, to-do lists, etc.”
“In spite of the to-do in the papers about “French fleet out of action”, etc.,”
“Zenbe Personal – Zenbe Personal organizes your emails and attachments (from Zenbe and existing POP accounts) with labels and search â and integrates calendar, to-do list, twitter and Facebook updates, too.”
“But, between long hours at the office, family responsibilities, and endless to-do lists, it's not feasible for women to spend hours in front of the mirror trying to look perfect.”
The Huffington Post: Bobbi Brown: Being Pretty Powerful is Much Bigger Than Beauty
“And of course, that age-old adage always holds true: the fear of attacking something on your dreaded to-do list is always much greater than the actual task itself.”
The Huffington Post: Delia Lloyd: 5 Ways to Improve Your Fiction
Lists
These user-created lists contain the word ‘to-do’.
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A spoonful of sugar
Words I should learn/I want to learn/I just learned, with a quotation to help the medicine go down.
approbation, assuage, chicanery, abscond, effrontery, enervation, equivocate, ennui, aftertaste, filibuster, perfunctory, abide and 391 more...
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Yet more words
hootowling, hoot owl, midday, prohibitive, shutdown, gerund, tripe, doweling, detestable, good measure, boojum, undergirding and 167 more...
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The Heart Is A Lonely Hunter
Words gatherd while reading The Heart Is A Lonely Hunter by Carson McCullers.
eiderdown, sowbelly, shambling, linthead, bohunk, lingeringly, undervest, rosette, scroughe, gramophone, nair, tousle and 28 more...
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Shindigs
hoo-ha, shindig, soiree, convention, congress, confabulation, rap session, bash, blowout, fete, gala, festival and 36 more...
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brouhaha
apoplexy, brouhaha, flapdoodle, kerfuffle, fuss, tizzy, clamor, furor, hubbub, uproar, fit, state and 38 more...
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Wonder words
Some words that invoke in me a sense of wonder.....
syzygy, to-do, mystic, limerence, sprawl, wiki, cyclic, synechdochically, ganja, logos, timbre, lovely and 1 more...
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Words from the Collected Stories of F...
demimonde, grandiloquent, libertine, virtuous, vacuous, discord, mulatto, precocious, pregnable, languor, pickaninny, ineffable and 42 more...
Tweets
Looking for tweets for to-do.

Ed_Jogg Things can have this quality of being 'to-do'. They are 'to-do' things but are commonly referred to as 'things to-do'.
'To-Do' is also (onomatopoeically) the noise one emits in an attempt to avoid colliision with another person.
Oh. No, sorry, That's 'toot-toot'. :) Feb 9, 2011
slumry Making a big to-do over the "to do" list. Jul 2, 2007