an act or instance of buying in.
the deliberate submission of a false bid, too low to be met, in order to win a contract.
Poker. the chips purchased by a player from the banker, occasionally a set amount required to enter a specific competition or game.

Origin of buy-in

noun use of verb phrase buy in



verb (used with object), bought, buy·ing.

to acquire the possession of, or the right to, by paying or promising to pay an equivalent, especially in money; purchase.
to acquire by exchange or concession: to buy favor with flattery.
to hire or obtain the services of: The Yankees bought a new center fielder.
to bribe: Most public officials cannot be bought.
to be the monetary or purchasing equivalent of: Ten dollars buys less than it used to.
Chiefly Theology. to redeem; ransom.
Cards. to draw or be dealt (a card): He bought an ace.
  1. to accept or believe: I don't buy that explanation.
  2. to be deceived by: He bought the whole story.

verb (used without object), bought, buy·ing.

to be or become a purchaser.


an act or instance of buying.
something bought or to be bought; purchase: That coat was a sensible buy.
a bargain: The couch was a real buy.

Verb Phrases

buy down, to lower or reduce (the mortgage interest rate) by means of a buy-down.
buy in,
  1. to buy a supply of; accumulate a stock of.
  2. to buy back one's own possession at an auction.
  3. to undertake a buy-in.
Also buy into.
buy into, to purchase a share, interest, or membership in: They tried to buy into the club but were not accepted.
buy off, to get rid of (a claim, opposition, etc.) by payment; purchase the noninterference of; bribe: The corrupt official bought off those who might expose him.
buy out, to secure all of (an owner or partner's) share or interest in an enterprise: She bought out an established pharmacist and is doing very well.
buy up, to buy as much as one can of something or as much as is offered for sale: He bought up the last of the strawberries at the fruit market.

Origin of buy

before 1000; Middle English byen, variant of byggen, buggen, Old English bycgan; cognate with Old Saxon buggjan, Gothic bugjan to buy, Old Norse byggja to lend, rent
Related formsbuy·a·ble, adjectivenon·buy·ing, adjective, nounpre·buy, verb (used with object), pre·bought, pre·buy··buy, verb, re·bought, re·buy·ing.un·buy·a·ble, adjectiveun·buy·ing, adjective
Can be confusedbuy by bye

Synonym study

1. Buy, purchase imply obtaining or acquiring property or goods for a price. Buy is the common and informal word, applying to any such transaction: to buy a house, vegetables at the market. Purchase is more formal and may connote buying on a larger scale, in a finer store, and the like: to purchase a year's supplies.

Antonyms for buy

1. sell. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for buy in

buy in

verb (adverb)

(tr) to buy back for the owner (an item in an auction) at or below the reserve price
(intr) to purchase shares in a company
(intr) to buy goods or securities on the open market against a defaulting seller, charging this seller with any market differences
Also: buy into (tr) US informal to pay money to secure a position or place for (someone, esp oneself) in some organization, esp a business or club
to purchase (goods, etc) in large quantitiesto buy in for the winter

noun buy-in

the purchase of a company by a manager or group who does not work for that company


verb buys, buying or bought (mainly tr)

to acquire by paying or promising to pay a sum of money or the equivalent; purchase
to be capable of purchasingmoney can't buy love
to acquire by any exchange or sacrificeto buy time by equivocation
(intr) to act as a buyer
to bribe or corrupt; hire by or as by bribery
slang to accept as true, practical, etc
(intr foll by into) to purchase shares of (a company)we bought into General Motors
(tr) theol (esp of Christ) to ransom or redeem (a Christian or the soul of a Christian)
have bought it slang to be killed


a purchase (often in the phrases good or bad buy)

Word Origin for buy

Old English bycgan; related to Old Norse byggja to let out, lend, Gothic bugjan to buy


The use of off after buy as in I bought this off my neighbour was formerly considered incorrect, but is now acceptable in informal contexts
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 buy in



Old English bycgan (past tense bohte) "to buy, pay for, acquire; redeem, ransom; procure; get done," from Proto-Germanic *bugjanan (cf. Old Saxon buggjan, Old Norse byggja, Gothic bugjan), of unknown origin, not found outside Germanic.

The surviving spelling is southwest England dialect; the word was generally pronounced in Old English and Middle English with a -dg- sound as "budge," or "bidge." Meaning "believe, accept as true" first recorded 1926. Related: Bought; buying. To buy time "prevent further deterioration but make no improvement" is attested from 1946.



verbal phrase, "to purchase a commission or stock," 1826, from buy (v.) + in (adv.). As a noun by 1970.



"a purchase," especially a worthwhile one, 1879, American English, from buy (v.).

Online Etymology Dictionary, © 2010 Douglas Harper