Sewn pages/binding

Form of binding where all of the large printing sheets are folded into signatures and stitched together before being attached to the spine material, end papers, etc. This binding is normal for hardbacks and has a much longer lifespan than perfect binding.

This definition is extracted (and expanded on) from the book Getting Published: A Companion for the Humanities and Social Sciences by Gerald Jackson and Marie Lenstrup. It was first referred to in the blog Getting Published in a post on bookbinding.