Action: The action of a guitar refers to the height of the strings above the fretboard. The action can be adjusted on most guitars using a simple screwdriver or allen key in order to suit the player's preferences.

Amplifier: A guitar amplifier, also called an amp, is a component which increases the volume of a guitar signal. Amplifiers are also used to alter the signal in other ways to produce different tones.

Bend: Bending is a guitar technique predominantly used by lead players in order to shift the pitch of the strings being played. Half-step and full-step string bends are employed to add more color, complexity, and fluidity to a composition.

Bridge: The bridge is the component of the guitar responsible for supporting the strings and transmitting their vibrations to other parts of the guitar, such as the soundboard or pickups.

Chord: A guitar chord is a set of three or more notes which are played together simultaneously. There are many different types of chords, such as triad, seventh, extended, chromatic and suspended chords.

Cutaway: A guitar cutaway is a section of the guitar body that has been indented or specially shaped to allow easier access to the upper frets.

Fretboard: The fretboard, also known as the fingerboard, is a strip of wood that runs along the length of the guitar neck. The guitar strings run the length of the fretboard, which also has metal frets that designate changes in pitch.

Fret: Frets are raised strips of metal which are aligned horizontally down the length of the fretboard. These strips allow guitarists to achieve consistent pitches and tones, and also make it easier to locate notes along the fretboard.

Full-step: Full-steps - often called whole steps or whole tones, are a commonly used musical interval. Full-steps occur two frets apart on most guitars.

Half-step: A half-step, also called a semitome, is a musical interval that is equivalent to 1/12 of an octave. On most guitars, each fret is a half-step away from each other.

Hammer on: Hammer-ons are a technique that involve quickly and firmly fretting a higher note on a string that has already been plucked. This technique results in a smooth and connected sound instead of the disjointed phrasing that occurs if the notes are plucked individually.

Headstock: A guitar's headstock, also called the pegboard, is the component of the guitar which houses the machine heads and tuning pegs. It is located at the top of the neck of the guitar.

Inlays: Inlays are markings that are added to certain frets to make it easier to find your way around the fretboard with a quick glance. Usually, the 3rd, 5th, 7th, 9th, and 12th frets will have some sort of decorative inlays to help you get your bearings.

Neck: The neck of the guitar connects the body and the headstock. The fretboard is laminated to the neck of most guitars.

Nut: The guitar nut is a strip of material which sits between the headstock and the fretboard. The nut contains small grooves which guide the strings into place and keep them correctly aligned and parallel to each other on the fretboard.

Pick: A guitar pick is a small, flat tool that is used to pick or strum the strings on a guitar. Picks are made from a variety of materials including plastic, rubber, wood, and even tortoiseshell. Guitar picks come in varying thicknesses and shapes to suit different preferences and playing styles.

Pickup Selector Switch: This switch, seen only on electric guitars, allows the player to select which pickup to use. Switching between pickups alters the sound of the guitar.

Pickguard: Pickguards are components featured on some guitars which protect the body of the instrument from wear and damage cause by the pick scraping against it. As a player strums, the pick occassionally brushes the body of the instrument on the downward motion. Pickguards are layer of material which absorb these motions.

Pickup: Pickups are the devices which capture the vibrations of strings and convert them into electric current to be sent to an amplifier. Pickups are used on all electric guitars.

Pull-off: Pull-offs are a technique which equate to the opposite of a hammer-on. Instead of hammering on to a higher note on a string that has already been plucked, the player pulls off the higher note sharply while fretting a lower note on the same string. This technique results in smooth and connected phrasing without the abruptness of individual note plucking.

Scale: A scale is a series of notes, usually contained within a single octave, which are arranged by pitch according to the scheme of the scale.

Trill: A trill is a type of guitar technique which is essentially a series of rapid hammer-ons/pull-offs on the same note.

Truss Rod: A truss rod is a steel rod that reinforces the neck of the guitar, ensuring it doesn't bend or warp under that constant tension of the strings.

Tuner: A guitar tuner is an eletronic device which measures the pitch of the note being tuned and displays whether the note is flat or sharp.

Whammy Bar: A whammy bar, also called a tremolo arm, is a lever which allows a guitarist to quick achieve vibrato and pitch bend effects by varying the tension of the strings. The whammy bar is attached to the bridge on electric guitars.