Definition of Thessalonian
: of or relating to ancient Thessalonica, Macedonia
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Origin and Etymology of thessalonian
irregular from Thessalonica, seaport city of west central Macedonia (now Salonika) + English -an
Definition of Thessalonian
plural -s
1
: a native or resident of Thessaloníki, Greece
2
Thessalonians
plural in form but singular in construction
: either of two letters written by Paul to the Christians of Thessalonica and included as books in the New Testament
—abbreviation Th, Thes, Thess
— see Bible Table
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