a single income

A person's "income" is the money that they make from their job or business. In other words, it's your "pay" or "salary". Use the word "income" when you're talking about someone's pay in a technical or economic sense.

When there's only one person who has a job and makes money in a family, that family is described as "single income". If two people work and make money, it's a "dual income" family.

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