Versus means against or in contrast with. When two basketball teams play each other, you might see it written as “Lakers versus Celtics” or abbreviated as “Lakers vs. Celtics.” The word tells you that two sides are competing, facing off, or being compared.

You'll encounter versus constantly: in sports matchups, court cases (like “Brown v. Board of Education”), debates, or any situation where two options stand in opposition. When your class discusses “fiction versus nonfiction” or “mammals versus reptiles,” you're examining how two categories differ from each other.

Sometimes people use versus to frame a choice: “Should we vacation at the beach versus the mountains?” Here it means comparing two alternatives. Other times it signals genuine opposition: a chess match of “human versus computer” puts two rivals in direct competition.

You'll see versus abbreviated as “vs.” in casual writing and “v.” in legal cases. However you write it, the word sets up a face-off between two sides.