A relatively short, multi-movement work for solo piano. This genre was especially popular during the Classical period. Composers include Haydn, Beethoven, and Mozart.
A piano sonata is a sonata written for unaccompanied piano. Piano sonatas are usually written in three or four movements, occasionally just in one or two. The first movement is usually composed in sonata form.
Franz Liszt's Piano Sonata in B minor (Klaviersonate h-moll) is widely considered to be his greatest work for the instrument, and one of the seminal works of the Romantic piano literature.