usage

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The act, manner, or amount of using; use.
• noun The act or manner of treating; treatment.
• noun Habitual or accepted practice.
• noun A usual, habitual, or accepted practice.
• noun The way in which words or phrases are actually used, spoken, or written in a speech community.
• noun A particular expression in speech or writing.

from The Century Dictionary.

• noun Use; enjoyment.
• noun The act of using.
• noun Mode of using or treating; treatment.
• noun Long-continued use or practice; customary way of acting; habitual use; custom; practice: as, the ancient usage of Parliament.
• noun Established or customary mode of employing a particular word, phrase, or construction; current locution.
• noun Manners; behavior; conduct.
• noun Synonyms Habit, Manner, etc. See custom.

from the GNU version of the Collaborative International Dictionary of English.

• noun The act of using; mode of using or treating; treatment; conduct with respect to a person or a thing.
• noun obsolete Manners; conduct; behavior.
• noun Long-continued practice; customary mode of procedure; custom; habitual use; method.
• noun Customary use or employment, as of a word or phrase in a particular sense or signification.
• noun obsolete Experience.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun The manner or the amount of using; use
• noun Habit or accepted practice
• noun lexicography The ways and contexts in which spoken and written words are used, determined by a lexicographer's intuition or from corpus analysis.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun the act of using
• noun accepted or habitual practice
• noun the customary manner in which a language (or a form of a language) is spoken or written