Definitions of hologram on the Web:

A unique photographic printing that provides a three-dimensional effect on a flat surface. Holograms cannot be easily copied and are used for security and aesthetic purposes on cards.
www.duracard.com/glossary.htm

Unlike photography which records an image as seen from a single viewpoint, a hologram is a record of an image as seen from many viewpoints.
web.mit.edu/museum/lightforest/glossary.html

A laser-generated image with three-dimensional properties, increasingly used to deter counterfeiting of currency, credit cards, and identification.
www.hometravelagency.com/dictionary/ltrh.html

Definitions of holograph on the Web:

A term indicating the handwriting of the author.
www.ballandcross.com/index.php

A document handwritten by the person purported to have written it.
www.trussel.com/books/glossary.htm

A manuscript in the handwriting of its author. [See also AUTOGRAPH]
www.slais.ubc.ca/people/students/student-projects/M_Chesko/L513/definitions.htm

Document in the author's own handwriting.
www.geocities.com/Axiom43/literary.html

Written entirely by the hand of the author
www.booksellerworld.com/glossary-bookterms.htm

manuscript: handwritten book or document
hologram: the intermediate photograph (or photographic record) that contains information for reproducing a three-dimensional image by holography
wordnet.princeton.edu/perl/webwn

A holograph is a document written entirely in the handwriting of the person whose signature it bears. The laws of various U.S. states differ as to the validity of holographic last wills.
en.wikipedia.org/wiki/Holograph