fake book - any book of songs which gives you the written melody in notation with the chords written above the staff. Many books now also include tablature. Fake books allow quick access to songs. Any melody instrument can play the melody and improvise with the harmony structure of the chord progression.
format - song format - most songs are composed of one or more parts which are repeated.'A' is used to denote the verse or first part. 'B' is used to denote a second part. Most traditional songs use a triple A format of many verses following the same melody. Most traditional jigs and reels use an 'AABB' format of a first part played twice followed by a second part played twice. Modern songs now incorporate choruses which are denoted by a 'B' as well. Choruses are usually a repetition of a melodic and lyrical theme. The formats for songs with choruses are 'AABA' or 'AABABA'. It is also common practice to include a bridge 'C' which is usually short and used only once in a song, 'AABACBA'.
falsetto - or head voice, when only the outer edges of the vocal chords are used to create a sound. The falsetto or head range is above the full voice or chest range. It is also less dynamic (although very highly developed in the soprano range for opera) and without the overtones of the full voice sounding more like a harmonic tone.
fifth - an interval, the fifth note of a key, also called sol as in do, re, mi, fa, sol, la, ti, do. The fifth can also be the fifth note in a triad chord as in a major chord made up of the root, third and fifth.
five - the five chord - also designated as V in Roman numerals. Also call the dominant, the five chord is often played as a seventh chord. The five is found by counting up from the key or root chord by intervals of tone (whole step), tone, semitone (half step), tone. An example would be; in the key of C - C is I (one) D is ii (two) E is iii (three), F is IV (four) and G is V (five). Notice that the two and three are minor chords denoted by lower case Roman numeral.