Definitions for grace note
Random House Webster's College Dictionary
a musical note, as an appoggiatura, added as a melodic embellishment.
Category: Music and Dance
Origin of grace note:
grace note, appoggiatura, acciaccatura(noun)
an embellishing note usually written in smaller size
A musical note written in smaller print, with or without a slash through it, to indicate that its note value does not count as part of the total time value of the measure.
Concerns of secondary importance to that which is of primary concern.