responsibility

IPA: rispɑnsʌbˈɪɫʌti

The state of being responsible, accountable, or answerable. [from Template:SAFESUBST: c.]
The state of being liable, culpable, or responsible for something in particular.
A duty, obligation or liability for which someone is held accountable.
(military) The obligation to carry forward an assigned task to a successful conclusion. With responsibility goes authority to direct and take the necessary action to ensure success.
(military) The obligation for the proper custody, care, and safekeeping of property or funds entrusted to the possession or supervision of an individual.

Examples of "responsibility" in Sentences

That is the responsibility of the merchant.
This is a good thing, not simply because it demonstrates my great rectitude and adult social responsibility.