Definition of "responsible"

responsible

/ɹɪˈspɒnsəbəl/

adjective
comparative more responsible, superlative most responsible
1. (postpositive, followed by "for") Having the duty of taking care of something; answerable for an act performed or for its consequences; accountable; amenable, especially legally or politically.
2. (postpositive, followed by "for") Being a primary cause of a situation or action and thus able to be blamed or credited for it.
  Quotations
  […] Karius was a danger to his own team, responsible for Madrid’s two other goals and last seen wandering aimlessly around the pitch – alone, distraught and clearly traumatised – to ask forgiveness, hands clasped, from the thousands of Liverpool supporters.
  2018 May 26, Daniel Taylor, “Liverpool go through after Mohamed Salah stops Manchester City fightback”, in The Guardian (London)‎
3. (followed by "to") Answerable to (a superior).
4. (of a job or position) Involving important duties; involving a degree of personal accountability on the part of the person concerned.
5. Having good judgment in decision-making.
  Quotations
  But was it responsible governance to pass the Longitude Act without other efforts to protect British seamen? Or might it have been subterfuge—a disingenuous attempt to shift attention away from the realities of their life at sea.
  2012 March, William E. Carter, Merri Sue Carter, “The British Longitude Act Reconsidered”, in American Scientist‎, volume 100, number 2, page 87
6. Able to be trusted; reliable; trustworthy.
7. Capable of rational conduct and thus morally accountable for one's behavior.
noun
plural responsibles
1. (archaic) The individual who bears the responsibility for something.
  Quotations
  Were this not so, long since would we have traced directly home the responsibility for the war on Freedom in the Philippines. Long since, would we have hanged the responsibles as traitors to our country.
  1899, The Harlequin, volume 1, page 12
2. (theater) An actor taking on the lesser roles in repertory theatre.
  Quotations
  […] first appeared on August Bank Holiday, 1901, at Grand Theatre, Llandudno, playing "responsibles" with Edward Compton; […]
  1907, The Green Room Book; Or, Who's Who on the Stage, page 9
  'Well, the Cardinal is the heavy part, isn't it?' 'I know.' 'Then,' said I, 'you'd better go'; and one of the Responsibles took it on, and was perfect on the night.
  1926, Arthur Machen, Dreads and Drolls