n. The inclusion of hyphens; especially, the correct locations of hyphens.
The Century Dictionary and Cyclopedia
n. The act of joining with a hyphen, or the state of being so joined; use of hyphens.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. division of a word especially at the end of a line on a page
n. connecting syllables and words by hyphens
Word Usage
"As far as TeX or any typesetting is concerned, one of the most noticeable language-specific problems is incorrect hyphenation, that is, breaking words at sensible places."