Definition
To have a positive balance in a bank account or to be free of debt; to be profitable.
（財務）盈餘
After a year of losses, their business finally managed to be in the black.
在經歷了一年的虧損後，他們的業務終於實現了盈利。
After cutting costs and increasing revenue, the company is now in the black.
在削減成本和增加收入後，公司現在已經盈利。
Thanks to successful investments, his bank account is now in the black.
多虧成功的投資，他的銀行帳戶現在有盈餘了。