instant

Adjective

• demanding attention
  • clamant needs
    
  • a crying need
    
  • regarded literary questions as exigent and momentous- H.L.Mencken
    
  • insistent hunger
    
  • an instant need
    

• in or of the present month
  • your letter of the 10th inst
    

• occurring with no delay
  • relief was instantaneous
    
  • instant gratification
    

Noun

• a particular point in time
  • the moment he arrived the party began
    

• a very short time (as the time it takes the eye to blink or the heart to beat)
  • if I had the chance I'd do it in a flash
    

Related words

• Synonyms: 
  clamant , crying , exigent , insistent , inst , instantaneous , instant(a) , moment , minute , second