Definition of "classifier" [clas•si•fi•er]

• A word or morpheme used in some languages in certain contexts, such as counting, that indicates the semantic class to which an item belongs. For example, hon is used in Japanese in counting long slender objects such as sticks or pencils. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "“We had a computer learning algorithm on which we built our name classifier.”"
• "Large-scale unlabeled video samples are assumed to arrive consecutively in batches with an initial pre-labeled training set, based on which a preliminary multi-label classifier is built."
• "I know it may not have been intended that way, but the classifier was always used."