Definition of "Demand" :
noun: the act of demanding
"The kidnapper's exorbitant demands for money."
noun: required activity
"There were many demands on his time."
noun: an urgent or peremptory request
"His demands for attention were unceasing."
noun: the ability and desire to purchase goods and services
"The automobile reduced the demand for buggywhips."
noun: a condition requiring relief
"There is a demand for jobs."
verb: request urgently and forcefully
"The victim's family is demanding compensation."
verb: claim as due or just
"The bank demanded payment of the loan."
verb: ask to be informed of
"I demand an explanation."
verb: summon to court
verb: lay legal claim to
verb: require as useful, just, or proper
"This position demands a lot of personal sacrifice."