A cappella - Singing or performing without any instrumental accompaniment.

Atonal - a particular key is not kept in focus when writing or performing such music.

Beat - refers to the rhythm of the music piece.

Chord - refers to 3-4 notes which are played together (simultaneously).

Chord Progression - playing a group of chords one after the other.

Chorus - choir (group of singers); section of a song / composition which is repeated after every verse.

Flat - In music, Flat is denoted by the letter b and is lowered by one semi tone. Flat also means music that does not maintain its tune, too low in pitch and hence is out of tune.

Fret - commonly refers to the metal strip which runs across the fingerboard of a stringed instrument.

Harmony- refers to a mix or combination of two or three tones which are played together in the background while a melody is being played.

Major - refers to a form of scale with specific intervals. Music based on the Major keys have a positive and refreshing sound. In the major or diatonic scale, the pattern or steps followed are - whole, whole, half, whole, whole, whole, half - is : eg C-D-E-F-G-A-B-C –

Minor - refers to a form of the tonal system and music based on the minor keys, generally having a melancholic and sad sound. In this diatonic scale the pattern or steps followed is - whole-half-whole-whole-half-whole-whole - C-D-Eb-F-G-Ab-Bb-C

Pitch - determines how high or low a sound is.

Relative Minor & major - The Major or minor scales having the same key signature.

Stanza - a song's verse

Time Signature - helps to determine the number of beats to a measure and is depicted by a numeric sign in sheet music.