Any text written on a book or document by its author not just their signature. A letter might be signed but have been written on a typewriter however a letter described as an autograph letter was written by the hand that signed it.

A manuscript in the hand of a known person either of his own work or of the work of another.

the signature of an important or famous person. Often they are accompanied by an endearment such as, "best wishes from ...". Unless it is also an association copy a plain autograph is more desirable than something like " To Karen, best wishes from ...".

something written by one's own hand

mark with one's signature; "The author autographed his book"

a great momento, and might be worth a lot of money some day, but can always get ruined or lost or written over

a music manuscript written in the hand of the composer, and it contains not only the composer's

A manuscript copy in the author or composer's own hand.

The author's signature, typically found on the title page or flyleaf of a book.

a hand-written score or part written by the composer himself

an original manuscript in the author's handwriting.

An autograph is a manuscript written by the author of the text

Manuscript of a musical work in the composer's own hand.

An autograph is a document written entirely in the handwriting of its author, as opposed to a typeset document or one transcribed by an amanuensis or a copyist; the meaning overlaps with that of the word holograph.