n]
| 1. | having income exactly equal to expenditure, thus showing neither profit nor loss. |
| 2. | break-even point. |
| 3. | Energy. the stage at which a fission or fusion reaction becomes self-sustaining. |

breakeven
The level of output or sales necessary to cover fixed expenses. Companies in industries that have high fixed costs and, consequently, high breakevens, such as automobile and steel manufacturing, are likely to exhibit large fluctuations in earnings.
The price at which a security position can be closed out with no profit or loss.