a piano with an upright rectangular body and with its strings running vertically.Compare spinet(def 1).
Words nearby upright piano
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for upright piano
a piano which has a rectangular vertical caseCompare grand piano
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012