Verb
perform music from a score without having seen the score before
Source: WordNetYou can sightread better if you know your scales and arpeggios. James Galway
He is a brilliant pianist but he cannot sightread Source: Internet
First as sounded (more common), then as fingered (easier to sightread). Source: Internet
On his second visit, in April, Grieg brought with him the manuscript of his Piano Concerto, which Liszt proceeded to sightread (including the orchestral arrangement). Source: Internet