For the verb: "to buy"

Simple Past: bought
Past Participle: bought

WordReference Random House Learner's Dictionary of American English © 2014
bought /bɔt/USA pronunciation  v. 
    a pt. and pp. of buy.

Collins Concise English Dictionary © HarperCollins Publishers::

bought /bɔːt/ vb
  1. the past tense and past participle of buy

buy /baɪ/ vb (buys, buying, bought)(mainly tr)
  1. to acquire by paying or promising to pay a sum of money or the equivalent; purchase
  2. to be capable of purchasing: money can't buy love
  3. to acquire by any exchange or sacrifice: to buy time by equivocation
  4. (intransitive) to act as a buyer
  5. to bribe or corrupt; hire by or as by bribery
  6. slang to accept as true, practical, etc
  7. (intransitive) followed by into: to purchase shares of (a company): we bought into General Motors
  8. (transitive) (esp of Christ) to ransom or redeem (a Christian or the soul of a Christian)
  9. have bought itslang to be killed
  1. a purchase (often in the phrases good or bad buy)

See also buy in, buy into, buy off, buy out, buy upEtymology: 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

'bought' also found in these entries:

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