I. ˈad-və(r)-ˌser-ē, -ˌse-rē noun
( plural -sar·ies )
Date: 14th century
: one that contends with, opposes, or resists : enemy
• ad·ver·sari·ness noun
II. adjective
Date: 14th century
1. : of, relating to, or involving an adversary
2. : having or involving antagonistic parties or opposing interests
divorce can be an adversary proceeding