rallying cry ral·lyingcry uncommon noun 1. a slogan used to rally support for a cause “a cry to arms” “our watchword will be” “'” Synonymswar cryrallying crybattle crycrywatchword 2. a yell intended to rally a group of soldiers in battle Synonymswar crywar whooprallying crybattle cry Related words Broader terms crymotto WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.