Sa·lo·ni·ka (s?-l?n??-k?, s?l??-n??k?) See Thessaloníki.American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.Salonika (s??l?n?k?) or Salonican (Placename) the English name for ThessaloníkiCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014Sa?lon?i?ka (s??l?n ? k?, ?sæl ??ni k?) n. 1. Also, Sa?lon?i?ca,Sa?lo?ni?ki (Gk. ?s? l??ni ki) Official name, Thessalonike. Ancient, Therma. a seaport in S central Macedonia, in NE Greece, on the Gulf of Salonika. 339,496. 2. Gulf of, an arm of the Aegean, in NE Greece. 70 mi. (113 km) long. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.