Re·spon·si·ble a.
 1. Liable to respond; likely to be called upon to answer; accountable; answerable; amenable; as, a guardian is responsible to the court for his conduct in the office.
 2. Able to respond or answer for one's conduct and obligations; trustworthy, financially or otherwise; as, to have a responsible man for surety.
 3. Involving responsibility; involving a degree of accountability on the part of the person concerned; as, a responsible office.
 Syn: -- Accountable; answerable; amenable.
 -- Re*spon*si*ble*ness, n. -- Re*spon*si*bly, adv.

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 responsibleness
      n : a form of trustworthiness; the trait of being answerable to
          someone for something or being responsible for one's
          conduct; "he holds a position of great responsibility"
          [syn: responsibility] [ant: irresponsibility, irresponsibility]