Aggeus ag·geus uncommon noun 1. a Hebrew minor prophet SynonymsHaggai 2. an Old Testament book telling the prophecies of Haggai which are concerned mainly with rebuilding the temples after the Babylonian Captivity SynonymsHaggaiBook of Haggai Related words Broader terms bookprophet Parts ProphetsOld Testament WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.