The slang refers to the number of digits.
So, a seven-figure salary means earning over $1,000,000 per year. To get specific, anything from $1,000,000 per year to $9,999,999 is a seven-figure income.
(Eight figures means over $10,000,000, and six figures means $100,000 to 999,999.)
If you dream of a 7 figure salary job, you may have to think outside the box. While you can earn a 7 figure income being a CEO or rockstar sales executive, some of the most popular 7 figure salary jobs are those that are somewhat dream-worthy, such as acting or playing a professional sport.