gin·gi·vi·tis (j?n?j?-v??t?s)n. Inflammation of the gums, characterized by redness and swelling.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.gingivitis (?d??nd???va?t?s) n (Pathology) inflammation of the gumsCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014gin?gi?vi?tis (?d??n d???va? t?s) n. inflammation of the gums. [1870?75] Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.