Spinet/ˈspɪnət/ Definition 1 of 1Pro Tip 1/3Historical Instrument Spinet refers to a historical keyboard instrument, not common today. I saw an antique spinet displayed at the museum. Pro Tip 2/3Size and Portability A spinet is smaller and more portable than a traditional piano. Because our apartment is small, we bought a spinet. Pro Tip 3/3Distinctive Sound The spinet has a unique sound different from larger pianos, often softer and lighter. The spinet's delicate sound complemented the cozy room.