I Corinthians ico·rint·hians uncommon noun 1. a New Testament book containing the first epistle from Saint Paul to the church at Corinth SynonymsFirst Epistle of Paul the Apostle to the CorinthiaFirst Epistle to the CorinthiansI Corinthians Related words Broader terms book Parts New Testament WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.