Definitions of use:

• noun:   the act of using

  Example: "He warned against the use of narcotic drugs"

• noun:   a particular service

  Example: "He put his knowledge to good use"

• noun:   (law) the exercise of the legal right to enjoy the benefits of owning property

  Example: "We were given the use of his boat"

• noun:   exerting shrewd or devious influence especially for one's own advantage
• noun:   a pattern of behavior acquired through frequent repetition

  Example: "Long use had hardened him to it"

• noun:   what something is used for

  Example: "Ballet is beautiful but what use is it?"

• noun:   (economics) the utilization of economic goods to satisfy needs or in manufacturing
• verb:   habitually do something (use only in the past tense)

  Example: "She used to call her mother every week but now she calls only occasionally"

• verb:   seek or achieve an end by using to one's advantage

  Example: "She uses her influential friends to get jobs"

• verb:   use up, consume fully
• verb:   put into service; make work or employ (something) for a particular purpose or for its inherent or natural purpose

  Example: "Use your head!"

• verb:   take or consume (regularly or habitually)

  Example: "She uses drugs rarely"

• verb:   avail oneself to

  Example: "Use care when going down the stairs"