A ukulele chord is a combination of two or more notes played simultaneously on a ukulele, a small stringed instrument. Chords are essential for creating harmony in music and are typically represented by letters, such as C, G, or F. Each chord corresponds to a specific finger positioning on the instrument's fretboard. To play a chord, a musician presses down on the strings at certain frets while strumming or plucking the strings. Learning basic chords is crucial for beginners, as it allows them to play a variety of songs and develop their skills on the ukulele.