1. Answerable for an act performed or for its consequences; accountable; amenable, especially legally or politically.
    Parents are responsible for their child's behaviour.
  2. Capable of responding to any reasonable claim; able to answer reasonably for one's conduct and obligations; capable of rational conduct.
  3. Involving responsibility; involving a degree of personal accountability on the part of the person concerned.
    She has a responsible position in the firm.
  4. Being a primary cause or agent of some event or action; capable of being credited for something, or of being held liable for something.
    Who is responsible for this mess?
  5. Able to be trusted; reliable; trustworthy.
    He looks like a responsible guy.

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