Whereas is a word that introduces a contrast between two different facts or situations. When you say “I love swimming, whereas my brother prefers hiking,” you're pointing out how you and your brother differ. The word signals: “Here's one thing, but notice how this other thing is different.”

You'll often see whereas in formal writing. A school might announce: “Fifth graders will have recess at noon, whereas sixth graders will have recess at 12:30.” The word makes the comparison clear and organized.

In legal documents and official proclamations, whereas appears at the beginning of statements that explain background facts: “Whereas the student council voted to extend lunch by ten minutes, and whereas the principal has approved this change, the new schedule will begin Monday.” Each “whereas” introduces another reason or fact that supports what comes next.

Think of it as meaning “while” or “but in contrast.” It's more formal than simply saying “but,” which makes it useful when you want to sound official or want to clearly highlight differences between two things.