The phrase "substantial excerpt" means a significant portion or section taken from a longer piece of writing, speech, or any other type of content. Full definition
In addition to being adorned with countless film stills and behind - the - scenes photos, the book provides substantial excerpts from Disc 2 documentarian Charles Kiselyak's «Notes from the Cuckoo's Nest» (whatever that is). (dvdizzy.com)
As always, don't take my word for it - instead read a very substantial excerpt at BookBrowse (which I believe is exclusive to us) and decide for yourself. (bookbrowse.com)
It features substantial excerpts or the works in their entirety — many previously unpublished or long out - of - print — by artists and writers including Eleanor Antin, Louise Bourgeois, Fiona Banner, Theresa Hak Kyung Cha, Bhanu Kapil, Adrian Piper, Charlotte Salomon, Hannah Weiner, and Unica Zürn. (nypl.org)