duet

Definition (noun): two items of the same kind

Definition (noun): two performers or singers who perform together

Definition (noun): a pair who associate with one another

Example: the engaged couple

Definition (noun): a pair who associate with one another

Example: an inseparable twosome

Definition (noun): a musical composition for two performers

Definition (noun): (ballet) a dance for two people (usually a ballerina and a danseur noble)