responsibility-n; 3 Senses

Sense Number 1: duty or obligation to something or someone

Commentary: RESPONSIBILITY[+role][+authority][+duty]
NOTE: can occur in the plural or singular responsibility as/for/of NP/COMP{+duty}

Jane accepts her responsibilities as a mother very seriously.
They accused the director of having shirked his responsibilities to the board.
A computer has the responsibility of tracking the missile's course in real time.
Management never assigned clear responsibility for the oversight of that product's development.

WordNet 3.0 Sense Numbers: 1

Sense Number 2: the quality or trait of being reliable, accountable or trustworthy

Commentary: RESPONSIBILITY[+trait][+reliability] the trait of being trustworthy or dependable

The great heart surgeon exuded an air of responsibility about him.
I didn't see a trace of responsibility in the face of that car salesman.
Who could doubt the responsibility of that kindly priest?

WordNet 3.0 Sense Numbers: 3

Sense Number 3: a consequence, often negative

Commentary: RESPONSIBILITY[+role][+causal] 'take/bear' responsibility means to accept the role as a cause of some possible or actual event or state. responsibility for NP{+consequence}
NOTE: this sense always occurs in the singular.

Who should take responsibility for creating this mess?
No terrorist groups have yet accepted responsibility for the downed jetliner.
She wouldn't accept sole responsibility for saving the children, she said John had helped, too.
The sign states that the club does will not bear the responsibility for lost or stolen property.

WordNet 0.0 Sense Numbers: ??