acoustic guitar - sound is not amplified by electrical means

bass guitar - the lowest six-stringed guitar

cithern, citole, cittern, gittern, cither - a 16th century musical instrument resembling a guitar with a pear-shaped soundbox and wire strings

electric guitar - a guitar whose sound is amplified by electrical means

fingerboard - a narrow strip of wood on the neck of some stringed instruments (violin or cello or guitar etc) where the strings are held against the wood with the fingers

Hawaiian guitar, steel guitar - guitar whose steel strings are twanged while being pressed with a movable steel bar for a glissando effect

stringed instrument - a musical instrument in which taut strings provide the source of sound

uke, ukulele - a small guitar having four strings