See the following links:
http://in.answers.yahoo.com/question/index?qid=20080331070607AAwzA4K
http://coachdes.wordpress.com/2005/10/24/english-use-and-usage/
The following is copied from page pointed to by the first link:
What is the difference between the words 'usage' and 'use'?
English question
Best Answer - Chosen by Asker
Usage means
1. a customary way of doing something; a custom or practice: the usages of the last 50 years.
2. the customary manner in which a language or a form of a language is spoken or written: English usage; a grammar based on usage rather than on arbitrary notions of correctness.
3. a particular instance of this: a usage borrowed from French.
4. any manner of doing or handling something; treatment: rough usage.
5. habitual or customary use; long-continued practice: immemorial usage.
6. an act of using or employing; use.
and use means
1. to employ for some purpose; put into service; make use of: to use a knife.
2. to avail oneself of; apply to one's own purposes: to use the facilities.
3. to expend or consume in use: We have used the money provided.
4. to treat or behave toward: He did not use his employees with much consideration.
5. to take unfair advantage of; exploit: to use people to gain one's own ends.
6. to drink, smoke, or ingest habitually: to use drugs.
7. to habituate or accustom.
8. Archaic. to practice habitually or customarily; make a practice of.
–verb (used without object) 9. to be accustomed, wont, or customarily found (used with an infinitive expressed or understood, and, except in archaic use, now only in the past): He used to go every day.
10. Archaic. to resort, stay, or dwell customarily.
–noun 11. the act of employing, using, or putting into service: the use of tools.
12. the state of being employed or used.
13. an instance or way of employing or using something: proper use of the tool; the painter's use of color.
14. a way of being employed or used; a purpose for which something is used: He was of temporary use. The instrument has different uses.
15. the power, right, or privilege of employing or using something: to lose the use of the right eye; to be denied the use of a library card.
16. service or advantage in or for being employed or used; utility or usefulness: of no practical use.
17. help; profit; resulting good: What's the use of pursuing the matter?
18. occasion or need, as for something to be employed or used: Would you have any use for another calendar?
19. continued, habitual, or customary employment or practice; custom: to follow the prevailing use of such occasions.
1. a customary way of doing something; a custom or practice: the usages of the last 50 years.
2. the customary manner in which a language or a form of a language is spoken or written: English usage; a grammar based on usage rather than on arbitrary notions of correctness.
3. a particular instance of this: a usage borrowed from French.
4. any manner of doing or handling something; treatment: rough usage.
5. habitual or customary use; long-continued practice: immemorial usage.
6. an act of using or employing; use.
and use means
1. to employ for some purpose; put into service; make use of: to use a knife.
2. to avail oneself of; apply to one's own purposes: to use the facilities.
3. to expend or consume in use: We have used the money provided.
4. to treat or behave toward: He did not use his employees with much consideration.
5. to take unfair advantage of; exploit: to use people to gain one's own ends.
6. to drink, smoke, or ingest habitually: to use drugs.
7. to habituate or accustom.
8. Archaic. to practice habitually or customarily; make a practice of.
–verb (used without object) 9. to be accustomed, wont, or customarily found (used with an infinitive expressed or understood, and, except in archaic use, now only in the past): He used to go every day.
10. Archaic. to resort, stay, or dwell customarily.
–noun 11. the act of employing, using, or putting into service: the use of tools.
12. the state of being employed or used.
13. an instance or way of employing or using something: proper use of the tool; the painter's use of color.
14. a way of being employed or used; a purpose for which something is used: He was of temporary use. The instrument has different uses.
15. the power, right, or privilege of employing or using something: to lose the use of the right eye; to be denied the use of a library card.
16. service or advantage in or for being employed or used; utility or usefulness: of no practical use.
17. help; profit; resulting good: What's the use of pursuing the matter?
18. occasion or need, as for something to be employed or used: Would you have any use for another calendar?
19. continued, habitual, or customary employment or practice; custom: to follow the prevailing use of such occasions.
Source(s):
dictionary.com