need in WordNet English dictionary

1. require as useful, just, or proper
   "It takes nerve to do what she did"; "success usually requires hard work"; "This job asks a lot of patience and skill"; "This position demands a lot of personal sacrifice"; "This dinner calls for a spectacular dessert"; "This intervention does not postulate a patient's consent"
   necessitate  ask  postulate  need  require  take  involve  call for  demand 
   
2. have need of
   "This piano wants the attention of a competent tuner"
   want  need  require 
   
3. have or feel a need for
   "always needing friends and money"
   need 
   

1. a condition requiring relief
   "she satisfied his need for affection"; "God has no need of men to accomplish His work"; "there is a demand for jobs"
   need  demand 
   
2. a state of extreme poverty or destitution
   "their indigence appalled him"; "a general state of need exists among the homeless"
   indigence  need  penury  pauperism  pauperization 
   
3. the psychological feature that arouses an organism to action toward a desired goal; the reason for the action; that which gives purpose and direction to behavior
   "we did not understand his motivation"; "he acted with the best of motives"
   motivation  motive  need 
   
4. anything that is necessary but lacking
   "he had sufficient means to meet his simple needs"; "I tried to supply his wants"
   need  want