I. noun
1.
Synonyms: requirement 1, need, want
2.
Synonyms: need 3, occasion, use
II. verb
1.
to ask for something as or as if one's right or due
the physician demanded payment of his bill
Synonyms: call, challenge, claim, exact, postulate, require, requisition, solicit
Related Word: ask, request; bid, charge, command, direct, enjoin, order; cite, summon, summons; coerce, compel, constrain, force, oblige; necessitate
Contrasted words: cede, relinquish, resign, waive; allow, concede, grant; give, offer, tender
2.
to have as a need or requirement
it demands considerable practice to master the piano
Synonyms: ask, call (for), crave, necessitate, require, take
Related Word: fail, lack, need, want
Idioms: need ( or want), doing, stand in need of