Grace-note meaning

A musical note, especially an appoggiatura, added as an embellishment, printed in small type, and not counted in rhythm.
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A note not necessary to the melody, added only for ornamentation: it is usually printed as a small note with a slant line through the stem, just before the note that it embellishes.
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(music) 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.
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(figuratively) Concerns of secondary importance to that which is of primary concern.

In planning a banquet, one might consider the decision of the color of napkins to be used to be a grace note in relation to deciding the courses that would be offered on the menu.

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