guitar

gui‧tar S3 W3 /ɡɪˈtɑː $ -ˈtɑːr/ BrE AmE noun [countable]
[Date: 1600-1700; Language: French; Origin: guitare, from Spanish guitarra, from Arabic qitar, from Greek kithara type of stringed instrument]
a musical instrument usually with six strings that you play by pulling the strings with your fingers or with a ↑plectrum (=small piece of plastic, metal etc)
an acoustic/an electric/a classical guitar ⇨ ↑bass guitar, ↑steel guitar

Oxford Advanced Learner's Dictionary

guitar

gui·tar [guitar guitars] [ɡɪˈtɑː(r)] [ɡɪˈtɑːr] noun

a musical instrument that usually has six strings, that you play with your fingers or with a plectrum
• an acoustic/an electric/a classical, etc. guitar
• a guitar player
• Do you play the guitar?
• She plays guitar in a band.
• As he sang, he strummed his guitar.
see also air guitar, bass
Word Origin:
early 17th cent.: from Spanish guitarra (partly via French), from Greek kithara, denoting an instrument similar to the lyre.
Example Bank:
• He gently plucked his guitar.

• He would stand in front of the mirror, playing air guitar to Van Halen songs.

Cambridge Advanced Learner's Dictionary

guitar

guitar /gɪˈtɑːʳ/ US /-ˈtɑːr/
noun [C]
a musical instrument with six strings and a long neck which is usually made of wood, and which is played by pulling or hitting the strings with the fingers:
He sat on the grass, strumming his guitar.
an acoustic guitar
an electric guitar

guitarist /gɪˈtɑː.rɪst/ US /-ˈtɑːr.ɪst/
noun [C]
a person who plays the guitar:
a classical/folk/rock guitarist

Collins Advanced Learner’s English Dictionary

guitar

/gɪtɑ:(r)/
(guitars)

Frequency: The word is one of the 3000 most common words in English.

A guitar is a musical instrument with six strings and a long neck. You play the guitar by plucking or strumming the strings.

N-VAR: oft the N

Merriam-Webster's Advanced Learner's Dictionary

guitar

gui·tar /gɪˈtɑɚ/ noun, pl -tars [count] : a musical instrument that is held against the front of your body and that has usually six strings which are played with your fingers or with a pick
• an acoustic/electric guitar
• I'm learning to play the guitar. = (US) I'm learning to play guitar.
• a guitar player
- see picture at stringed instrument
- gui·tar·ist /gɪˈtɑrɪst/ noun, pl -ists [count]
• She's a very talented guitarist.