military unit mi·li·ta·ryunit uncommon noun 1. a unit that is part of some military service “he sent Caesar a force of six thousand men” Synonymsmilitary unitmilitary forcemilitary groupforce Related words Broader terms unit Narrower terms trip wirecommandenemytask forcearmy unitnaval unitair unitarmor Parts military service Part of serviceman WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.