castanets kas-TI-nets Your browser does not support the audio element. [ Spanish ] Definition Small, hand-held instrument made of concave shells of ivory or hard wood used by Spanish dancers to accompany dances such as the bolero, cachucha, flamenco, etc. with a sharp clapping sound. Share Share on Facebook (opens in a new tab) Share on X (opens in a new tab) Last Updated: 2016-05-20 20:45:12