Wordnet 3.0
NOUN (1)
1. 
 the phonological or orthographic sound or appearance of a word that can be used to describe or identify something; 
- Example: "the inflected forms of a word can be represented by a stem and a list of inflections to be attached"[syn: form, word form, signifier, descriptor]
WordNet (r) 3.0 (2006):
signifier
    n 1: the phonological or orthographic sound or appearance of a
         word that can be used to describe or identify something;
         "the inflected forms of a word can be represented by a stem
         and a list of inflections to be attached" [syn: form,
         word form, signifier, descriptor]