Glossary of Literary Theory by Greig E. Henderson and Christopher Brown

Textuality:

Écriture, the social institution of writing, a heterogeneous collection of texts that interanimate one other (intertextuality) and that cannot be studied as autonomous objects. Textuality is an all-embracing term for the idea that the world itself is nothing but a culturally endorsed system of signs -- of shared codes, conventions, and ideologies -- a textual system whose free play is limitless.