From Longman Dictionary of Contemporary Englishgrand pianoˌgrand piˈano (also grand) noun [countable] 
APMthe type of large piano often used in concerts, with strings in a horizontal position → upright piano
APMthe type of large piano often used in concerts, with strings in a horizontal position → upright pianoExamples from the Corpus
grand piano• Her house had a bathroom, and a rose garden, and a grand piano in the front room.• The essential design of a grand piano, apart from incremental technical advances, has not changed for more than a century.• I remember the first gig I went to in Cleveland, the grand piano was two feet too short.• Say they will move your grand piano any day and do it on a bicycle. 