cello
n. countable B1 Intermediate US //ˈtʃɛɫoʊ// UK //tʃˈɛləʊ// cel·lo
n. a large musical instrument with four strings that you play with a bow while sitting down. It has a deep, beautiful sound and you hold it between your knees.
n. a large, four-stringed musical instrument of the violin family, held between the knees and played with a bow. It is pitched an octave below the viola.
She practices the cello for two hours every afternoon.
While the violin often carries the main melody, the cello provides a rich, resonant foundation that bridges the gap between the higher strings and the double bass.
Usage
The plural form is 'cellos'.