Wordnet 3.0
NOUN (2)
1.
a person who creates classifications;
2.
a word or morpheme used in some languages in certain contexts (such as counting) to indicate the semantic class to which the counted item belongs;
The Collaborative International Dictionary of English v.0.48:
Classifier \Clas"si*fi`er\, n.
One who classifies.
[1913 Webster]
WordNet (r) 3.0 (2006):
classifier
n 1: a person who creates classifications
2: a word or morpheme used in some languages in certain contexts
(such as counting) to indicate the semantic class to which
the counted item belongs