Adjective

(en adjective)

Ready to do something that is not (can't be expected as) a matter of course.

*

, title=(The Celebrity), chapter=5 , passage=In the eyes of Mr. Farquhar Fenelon Cooke the apotheosis of the Celebrity was complete. The people of Asquith were not only willing to attend the house-warming, but had been worked up to the pitch of eagerness. The Celebrity as a matter of course was master of ceremonies.}}

*{{quote-magazine, date=2013-06-07, author=David Simpson

, volume=188, issue=26, page=36, magazine=(The Guardian Weekly) , title= Fantasy of navigation , passage=Like most human activities, ballooning has sponsored heroes and hucksters and a good deal in between. For every dedicated scientist patiently recording atmospheric pressure and wind speed while shivering at high altitudes, there is a carnival barker with a bevy of pretty girls willing to dangle from a basket or parachute down to earth.}}

Adjective

(en adjective)

Answerable for an act performed or for its consequences; accountable; amenable, especially legally or politically.

* {{quote-magazine, date=2012-03

, author=William E. Carter, Merri Sue Carter , title=The British Longitude Act Reconsidered , volume=100, issue=2, page=87 , magazine= citation , passage=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.}}

Parents are responsible for their child's behaviour.

Capable of responding to any reasonable claim; able to answer reasonably for one's conduct and obligations; capable of rational conduct.

Involving responsibility; involving a degree of personal accountability on the part of the person concerned.

She has a responsible position in the firm.

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?

Able to be trusted; reliable; trustworthy.

He looks like a responsible guy.