The word Rus or Rus' (Русь in Cyrillic Alphabet) may refer to:

• the Rus' (people) of disputed origin who were at the roots of the statehood of Eastern Slavic peoples;
• the territories they ruled, also known by the Latinized name, Ruthenia;
• Kievan Rus', the most powerful of early Ruthenian (Eastern Slav) states;
• the legendary founder of Russia, brother of Lech and Czech.

See also: Etymology of Rus and derivatives.

Other, unrelated meanings include:

• the Danish spelling of russ, a Scandinavian cultural phenomenon associated with graduation from high school.
• the Ashkenazi/Yiddish pronunciation and transliteration for the Hebrew name Ruth.