adj, noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   Country that wages war against a common enemy, without the countries on the same side having a formal treaty of military alliance.

Adjective

1. 1
   Carrying on war in conjunction with another power. not-comparable

Etymology

From co- + belligerent.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.