What does "break even" mean?

Neither gain nor lose in some venture, recoup the amount one invested. For example, If the dealer sells five cars a week, he'll break even. This expression probably came from one or another card game (some authorities say it was faro), where it meant to bet that a card would win and lose an equal number of times. It soon was transferred to balancing business gains and losses. Novelist Sinclair Lewis so used it in Our Mr. Wrenn (1914). The usage gave rise to the noun break-even point, for the amount of sales or production needed for a firm to recoup its investment. [Late 1800s]