Definitions of maintain:

• verb:   state or assert

  Example: "He maintained his innocence"

• verb:   maintain for use and service
• verb:   keep in a certain state, position, or activity
• verb:   support against an opponent
• verb:   maintain by writing regular records

  Example: "Maintain a record"

• verb:   of power or authority
• verb:   keep in safety and protect from harm, decay, loss, or destruction
• verb:   observe correctly or closely
• verb:   state categorically
• verb:   supply with necessities and support