Rit.
Ritardando – Gradually slowing down
Chord
Three or more notes sounding together
Crescendo
Growing louder
Decrescendo/Diminuendo
Growing softer
Fortissimo ff
Very loud
Interval
The distance in pitch between two tones
Legato
Play in a smooth and connected manner
Major Triad
A triad with four half steps between the root and third of the chord and three half steps between the third and the fifth of the chord.
Mezzo Forte mf
Moderately loud
Mezzo Piano mp
Moderately soft
Natural
A sign that cancels a sharp or flat
Ornament
A note or notes added to “beat” notes of music. The notes decorate or embellish the music.
Pianissimo pp
Very soft
Tempo
The speed of steady beats, moving in time.
Time Signature
Two numbers, one on top of the other, that indicate the number of beats in the music that follows.
Tonic
The first note of a scale, scale step one: the Keynote
Triad
A three note chord, built of thirds.