Antonyms of adj one-party

1 sense of one-party

Sense 1
one-party -- (determined by a single party)

INDIRECT (VIA unilateral) -> multilateral, many-sided -- (having many parts or sides)

Similarity of adj one-party

1 sense of one-party

Sense 1
one-party -- (determined by a single party)
       => unilateral (vs. multilateral), one-sided -- (involving only one part or side; "unilateral paralysis"; "a unilateral decision")