either of two books of the New Testament, 1 Thessalonians or 2 Thessalonians, written by Paul. Abbreviations: Thes., Thess.
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British Dictionary definitions for Thessalonians
(functioning as singular) either of two books of the New Testament (in full The First and Second Epistles of Paul the Apostle to the Thessalonians)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012