do a number on (someone). number(def 39).
    do away with,
    1. to put an end to; abolish.
    2. to kill.
    do one proud. proud(def 11).
    do one's number. number(def 40).
    do one's (own) thing. thing1(def 22).
    do or die, to make a supreme effort.
    do out of, Informal. to swindle; cheat: A furniture store did me out of several hundred dollars.
    dos and don'ts, customs, rules, or regulations: The dos and don'ts of polite manners are easy to learn.
    do time, Informal. to serve a term in prison: It's hard to get a decent job once you've done time.
    do to death. death(def 15).
    have to do with. have(def 37).
    make do, to get along with what is at hand, despite its inadequacy: I can't afford a new coat so I have to make do with this one.

Origin of do

before 900; Middle English, Old English dōn; cognate with Dutch doen, German tun; akin to Latin -dere to put, facere to make, do, Greek tithénai to set, put, Sanskrit dadhāti (he) puts
Can be confuseddew do dew

Synonyms for do

1, 27. act.

Synonym study

3. Do, accomplish, achieve mean to bring some action to a conclusion. Do is the general word: He did a great deal of hard work. Accomplish and achieve both connote successful completion of an undertaking. Accomplish emphasizes attaining a desired goal through effort, skill, and perseverance: to accomplish what one has hoped for. Achieve emphasizes accomplishing something important, excellent, or great: to achieve a major breakthrough. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for do in

do in

verb (tr, adverb) slang

to murder or kill
to exhaust


abbreviation for

Doctor of Optometry
Doctor of Osteopathy



verb does, doing, did or done

to perform or complete (a deed or action)to do a portrait; the work is done
(often intr; foll by for) to serve the needs of; be suitable for (a person, situation, etc); sufficethere isn't much food, but it'll do for the two of us
(tr) to arrange or fixyou should do the garden now
(tr) to prepare or provide; servethis restaurant doesn't do lunch on Sundays
(tr) to make tidy, elegant, ready, etc, as by arranging or adorningto do one's hair
(tr) to improve (esp in the phrase do something to or for)
(tr) to find an answer to (a problem or puzzle)
(tr) to translate or adapt the form or language ofthe book was done into a play
(intr) to conduct oneselfdo as you please
(intr) to fare or managehow are you doing these days?
(tr) to cause or producecomplaints do nothing to help
(tr) to give or renderyour portrait doesn't do you justice; do me a favour
(tr) to work at, esp as a course of study or a professionhe is doing chemistry; what do you do for a living?
(tr) to perform (a play, etc); actthey are doing ``Hamlet'' next week
(tr) to travel at a specified speed, esp as a maximumthis car will do 120 mph
(tr) to travel or traverse (a distance)we did 15 miles on our walk
(takes an infinitive without to) used as an auxiliary before the subject of an interrogative sentence as a way of forming a questiondo you agree?; when did John go out?
(takes an infinitive without to) used as an auxiliary to intensify positive statements and commandsI do like your new house; do hurry!
(takes an infinitive without to) used as an auxiliary before a negative adverb to form negative statements or commandshe does not like cheese; do not leave me here alone!
(takes an infinitive without to) used as an auxiliary in inverted constructionslittle did he realize that; only rarely does he come in before ten o'clock
used as an auxiliary to replace an earlier verb or verb phrase to avoid repetitionhe likes you as much as I do
(tr) informal to visit or explore as a sightseer or touristto do Westminster Abbey
(tr) to wear out; exhaust
(intr) to happen (esp in the phrase nothing doing)
(tr) slang to serve (a period of time) as a prison sentencehe's doing three years for burglary; he's doing time
(tr) informal to cheat or swindle
(tr) slang to robthey did three shops last night
(tr) slang
  1. to arrest
  2. to convict of a crime
(tr) Australian informal to lose or spend (money) completely
(tr) slang, mainly British to treat violently; assault
(tr) slang to take or use (a drug)
(tr) taboo, slang (of a male) to have sexual intercourse with
(tr) to partake in (a meal)let's do lunch
do or do a informal to act like; imitatehe's a good mimic – he can do all his friends well
do or die to make a final or supreme effort
how do you do? a conventional formula when being introduced
make do to manage with whatever is available

noun plural dos or do's

slang an act or instance of cheating or swindling
informal, mainly British and NZ a formal or festive gathering; party
do's and don'ts informal those things that should or should not be done; rules

Word Origin for do

Old English dōn; related to Old Frisian duān, Old High German tuon, Latin abdere to put away, Greek tithenai to place; see deed, doom



noun plural dos

a variant spelling of doh 1



the internet domain name for

Dominican Republic
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for do in



Middle English do, first person singular of Old English don "make, act, perform, cause; to put, to place," from West Germanic *don (cf. Old Saxon duan, Old Frisian dua, Dutch doen, Old High German tuon, German tun), from PIE root *dhe- "to put, place, do, make" (see factitious).

Use as an auxiliary began in Middle English. Periphrastic form in negative sentences ("They did not think") replaced the Old English negative particles ("Hie ne wendon"). Slang meaning "to do the sex act with or to" is from 1913. Expression do or die is attested from 1620s. Cf. does, did, done.



first (and last) note of the diatonic scale, by 1754, from do, used as a substitution for ut (see gamut) for sonority's sake, first in Italy and Germany. U.S. slang do-re-mi "money" is from 1920s, probably a pun on dough in its slang sense of "cash."

Online Etymology Dictionary, © 2010 Douglas Harper

Idioms and Phrases with do in

do in


Tire out, exhaust, as in Running errands all day did me in. [Colloquial; early 1900s] Also see done in.


Kill, as in Mystery writers are always thinking of new ways to do their characters in. [Slang; early 1900s] Also see def. 4.


Ruin utterly; also cheat or swindle. For example, The five-alarm fire did in the whole block, or His so-called friend really did him in. [First half of 1900s]


do oneself in. Commit suicide, as in She was always threatening to do herself in. [Slang; first half of 1900s]

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.