constant

Adjective

• uninterrupted in time and indefinitely long continuing
  • the ceaseless thunder of surf
    
  • in constant pain
    
  • night and day we live with the incessant noise of the city
    
  • the never-ending search for happiness
    
  • the perpetual struggle to maintain standards in a democracy
    
  • man's unceasing warfare with drought and isolation
    
  • unremitting demands of hunger
    

• steadfast in purpose or devotion or affection
  • a man constant in adherence to his ideals
    
  • a constant lover
    
  • constant as the northern star
    

• unvarying in nature
  • maintained a constant temperature
    
  • principles of unvarying validity
    

Noun

• a number representing a quantity assumed to have a fixed value in a specified mathematical context
  • the velocity of light is a constant
    

• a quantity that does not vary

Related words

• Synonyms: 
  ceaseless , incessant , never-ending , perpetual , unceasing , unremitting , changeless , invariant , unvarying , constant quantity , invariable