RESPONSIBLE (adj)

1. answerable or accountable, as for something within one's power, control, or management (often fol. by to or for): He is responsible to the president for his decisions.
2. involving accountability or responsibility: a responsible position.
3. chargeable with being the author, cause, or occasion of something (usually fol. by for): Termites were responsible for the damage.
4. having a capacity for moral decisions and therefore accountable; capable of rational thought or action: The defendant is not responsible for his actions.
5. able to discharge obligations or pay debts.
6. reliable or dependable, as in meeting debts, conducting business dealings, etc.
7. (of a government, member of a government, government agency, or the like) answerable to or serving at the discretion of an elected legislature or the electorate.
—Syn. 1. liable. 4. competent. 5. solvent. 6. honest, capable, reliable, trustworthy.

* Excerpted from the Random House Webster's Unabridged Dictionary 3.0.