[ soo-per-ton-ik ]
/ ˌsu pərˈtɒn ɪk /
the second tone of a diatonic scale, being the next above the tonic.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for supertonic
D minor is the supertonic of C major; therefore C major is related to D minor and may be called its flat 7th.
In the last measure but one, both the supertonic and leading tone should appear.A Treatise on Simple Counterpoint in Forty Lessons|Friedrich J. Lehmann
British Dictionary definitions for supertonic
/ (ˌsuːpəˈtɒnɪk) /
the second degree of a major or minor scale
a key or chord based on this
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