certain

Adjective

• exercising or taking care great enough to bring assurance
  • be certain to disconnect the iron when you are through
    
  • be sure to lock the doors
    

• reliable in operation or effect
  • a quick and certain remedy
    
  • a sure way to distinguish the two
    
  • wood dust is a sure sign of termites
    

• established irrevocably
  • his fate is sealed
    

• certain to occur; destined or inevitable
  • he was certain to fail
    
  • his fate is certain
    
  • In this life nothing is certain but death and taxes- Benjamin Franklin
    
  • he faced certain death
    
  • sudden but sure regret
    
  • he is sure to win
    

• established beyond doubt or question; definitely known
  • what is certain is that every effect must have a cause
    
  • it is certain that they were on the bus
    
  • his fate is certain
    
  • the date for the invasion is certain
    

• having or feeling no doubt or uncertainty; confident and assured
  • felt certain of success
    
  • was sure (or certain) she had seen it
    
  • was very sure in his beliefs
    
  • sure of her friends
    

• definite but not specified or identified
  • set aside a certain sum each week
    
  • to a certain degree
    
  • certain breeds do not make good pets
    
  • certain members have not paid their dues
    
  • a certain popular teacher
    
  • a certain Mrs. Jones
    

Related words

• Synonyms: 
  sure , sealed , certain(p) , certain(a)
• Antonyms: 
  unsealed , uncertain , unsure , incertain