Guitar Terms: A Plain-English Glossary for Players

Anatomy Terms

Action: the distance between the strings and the tops of the frets, usually measured at the 12th fret. Standard acoustic action is 2.0-2.5mm on the bass side and 1.6-2.0mm on the treble side. Lower is easier to play; higher gives more volume and clarity.

Bracing: the internal wooden supports glued to the underside of the guitar top and back. Scalloped bracing (Martin) is thinner and more resonant; rectangular bracing (Gibson pre-war) is stiffer and louder but less nuanced. X-bracing is the standard pattern under the soundhole on almost all modern acoustic guitars.

Bridge: the wooden block glued to the lower half of the soundboard that anchors the strings at the body end. The saddle sits in a slot on top of the bridge. Bridge plates inside the guitar reinforce the bridge area to prevent the pull of the strings from tearing the top.

Fretboard: also called the fingerboard, this is the flat piece of wood (usually ebony, rosewood, or maple) glued to the face of the neck. It holds the frets and serves as the surface you press the strings against to change pitch.

Headstock: the top of the neck above the nut, where the tuning pegs are mounted. Common headstock styles include slotted (classical), solid 3-per-side (Martin, Taylor), and solid 3+3 (Gibson).

Tone and Playing Terms

Attack: the initial transient of a note, from the moment the pick or finger strikes the string. A bright attack has a sharp click; a soft attack has a gradual onset.

Bend: a note played by pressing a string down and then pushing or pulling it across the fretboard to raise the pitch. Half-step bends are standard in blues; whole-step and beyond are common in electric lead playing.

Capo: a device that clamps across the fretboard to raise the pitch of all strings by the same amount. Used to match vocal keys without re-learning chord shapes. The G7 Performance 3 ($22) is the gold standard.

Fingerstyle: playing with the individual fingers of the picking hand rather than a flatpick. Classical, folk, bluegrass, and modern instrumental fingerstyle are all variants.

Intonation: the tuning accuracy of a guitar at different fret positions. A well-intonated guitar plays in tune at the 12th fret compared to the open string within 2-3 cents.

Sustain: how long a note rings before decaying into silence. Solid wood guitars generally sustain 30-50% longer than laminate guitars, and rosewood back and sides give longer sustain than mahogany.

Hardware and Setup Terms

Nut: the small piece of bone, Tusq, or plastic at the top of the fretboard where the strings pass over before reaching the headstock. The nut's slot heights set the action at the first fret.

Saddle: the piece of bone, Tusq, or synthetic material that sits in a slot on the bridge and supports the strings at the body end. The saddle height controls the action at the 12th fret, and its shape controls intonation.

Scale length: the distance from the nut to the saddle, which determines string tension at any given pitch. Common scale lengths are 24.9" (Gibson), 25.4" (Martin), and 25.5" (Taylor and most Fender acoustics). Longer scale = higher tension = brighter tone; shorter scale = lower tension = warmer tone.

Truss rod: a steel rod running through the neck that can be adjusted to correct neck curvature. Most modern guitars have an adjustable truss rod accessed through the soundhole or the headstock. Turning clockwise straightens the neck; counter-clockwise adds forward bow.

Tuning machines: the gears at the headstock that wind the strings up to pitch. Quality tuning machines hold pitch for days; cheap ones drift within hours. Gotoh 510, Waverly, and Grover are the industry standards.

Musical Terms Every Player Should Know

Barre chord: a chord where the index finger presses down multiple strings at the same fret, forming a movable shape. F major is the first barre chord most players learn.

Capo position: the fret at which a capo is clamped. A capo at the 2nd fret raises every chord by a whole step.

Chord voicing: the specific arrangement of notes within a chord. A C chord played in open position sounds different from the same C chord played as a barre chord at the 8th fret, even though both contain the same notes.

Key: the tonal center of a song. A song in G major uses chords built on the G major scale, and G feels like home. Common keys for acoustic guitar are G, C, D, A, E, and their relative minors.

Pentatonic scale: a five-note scale used throughout blues, rock, folk, and country. The minor pentatonic in E is E-G-A-B-D-E and is the foundation of most beginner lead playing.

Time signature: the top number of a fraction at the start of a piece (4/4, 3/4, 6/8). Tells you how many beats are in each measure and what note value gets one beat. 4/4 is by far the most common in popular music.

Construction and Wood Terms

Tonewood: the wood used for the top, back, sides, and neck of a guitar. Common tonewoods include Sitka spruce (tops), East Indian rosewood (back and sides), mahogany (back and sides or tops), maple (back and sides), and ebony (fingerboard).

Dreadnought: a large-bodied acoustic guitar shape introduced by Martin in 1916. Loud, bass-heavy, and the most popular acoustic shape in modern playing.

Parlor: a small-bodied guitar shape with a short scale length and lighter string tension, popular in the late 19th and early 20th century. Modern reissues are good for fingerpicking and singer-songwriter work.

OM and 000: medium-bodied guitar shapes (orchestra model) with balanced tone and comfortable playability. The 000 has a shorter scale length (24.9") than the OM (25.4") but the same body shape.

Solid vs. laminate: solid wood guitars use single pieces of wood for the top, back, and sides. Laminate guitars use layers of wood pressed together. Solid wood opens up and improves over years of playing; laminate stays static.