in which three or more groups, nations, etc. take part 多边的；多国的 multilateral negotiations 多边谈判 The peace talks are to be conducted on a multilateral basis. 和平谈判将在多边基础上进行。 multilateral nuclear disarmament 多国核裁军。
having many sides or parts 有多条边的；有多个部分的 compare bilateral, trilateral, unilateral