Is It Correct to Say Vacation or Vacations?

When referring to one vacation, it would be singular. P.S.-> You would say it's plural or it's in the plural, with the article.

What is the difference between vacation and vacations?

- vacation is a countable noun. So you'd say "Last vacation, I visited my mother." You'd use the plural form only to refer to more than one vacation: "Our last three vacations have been disasters. It rained nonstop every year."

Is vacation plural or singular?

The noun vacation can be countable or uncountable. In more general, commonly used, contexts, the plural form will also be vacation. However, in more specific contexts, the plural form can also be vacations e.g. in reference to various types of vacations or a collection of vacations.