Definition of "break even"

break even

verb
third-person singular simple present breaks even, present participle breaking even, simple past broke even, past participle broken even
1. (idiomatic) To neither gain nor lose money.
  Quotations
  The BTC had no clear plan how to fulfil its remit to break even, year-on-year.
  2023 March 8, David Clough, “The long road that led to Beeching”, in RAIL, number 978, page 43
2. (idiomatic) To stay the same; to neither advance nor regress.