demand-n; 4 Senses

Sense Number 1: A duty or responsibility

Commentary: DEMAND[+state][+responsibility][+agent]
NOTE: usually in the plural
NOTE: implies an agent who is assigned the duty.

Examples:
The demands of his work affected his health.
She has enough demands on her time already.
Will he be equal to the demands of the office?

Mappings:
PropBank: NM
WordNet 3.0 Sense Numbers: 1

Sense Number 2: a forceful request

Commentary: DEMAND[+event][+action][+communication][+request][+forceful]

Examples:
He made his demands loudly, with lots of stomping and screaming.
Bob set up a demand deposit at his bank. (easy withdrawals - extension of core meaning)
The government wouldn't listen to the terrorists' demands.
The opposition has made demands to see the full report.
Mary now has video on demand in her home. (extension of core meaning)

Mappings:
PropBank: demand.01
WordNet 3.0 Sense Numbers: 1

Sense Number 3: Ability and desire to purchase

Commentary: DEMAND[+state][+desire][+enabled][+purchase][+goods/+services] An economic concept. Refers to the ability and the desire to purchase something,

Examples:
The demand for buggywhips exceeded the supply by 25%.
The influx of foreign competitors reduced the demand for computer chips.
Economists study the laws of supply and demand in large economic systems.
Ever-rising oil prices may eventually reduce the demand for it.
The young tenor is very much in demand in the major opera houses. (they want to hire him)
There was pent-up demand after several years of recession. (people can and want to buy things)

Mappings:
PropBank: demand.01
WordNet 3.0 Sense Numbers: 1

Sense Number 4: A requirement, a need

Commentary: DEMAND[+event][+state][+requirement][+object]
NOTE: Refers to a feature that something must possess, not duties of an agent (see Sense 1)

Examples:
There's a real demand for some leadership in their political party. (party needs this quality)
The reporter has written for years about the unmet demands of better intelligence gathering.
These building codes do not meet the demands for an earthquake-proof structure.

Mappings:
PropBank: demand.01
WordNet 3.0 Sense Numbers: 1