D defs.my
Entry 1 sense Webster, 1913

Versus

/vẽrs'-əs/ · Ver·sus · IPA /ˈvɝsəs/
01 prep. Against; as, John Doe versus Richard Roe; -- chiefly used in legal language, and abbreviated to v. or vs.
  1. 1.
    Against; as, John Doe versus Richard Roe; -- chiefly used in legal language, and abbreviated to v. or vs.