ˈ ̷ ̷| ̷ ̷ adjective
1. of a relation in logic : constituted so that if one term is given only one thing can be the other term
in a monogamous society the relation “husband-wife” is one-one
— compare many-one , one-many
2. : one-to-one
a one-one correlation between the names of things and the things named — W.E.Johnson