Holy Roman Emperor ho·ly·ro·manemperor uncommon noun 1. sovereign of the Holy Roman Empire SynonymsHoly Roman Emperor Related words Word family Holy Roman Emperor Frederick II Broader terms Emperor Narrower terms CharlemagneCharles IIFerdinand IFerdinand IIFerdinand IIIFrancis IIFrederick IFrederick II WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
