To neither gain nor lose money.
After an entire night playing poker, he nearly broke even.
To stay the same; to neither advance nor regress.
It's a lot of work just to break even and keep the weeds down.
The level of revenues sufficient to cover costs.
We'll never reach break-even if our variable costs are higher than our selling price.
That is characterized by the level of revenues just sufficient to cover costs
The Altair 8800 computer was a break-even sale for MITS.