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Meaning of break-even

break-e•ven

Pronunciation: (brāk'ē'vun), [key]
— adj.
  1. having income exactly equal to expenditure, thus showing neither profit nor loss.
—n.
  1. See
  2. the stage at which a fission or fusion reaction becomes self-sustaining.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.