• adjective:   exercising or taking care great enough to bring assurance

  Example: "Be certain to disconnect the iron when you are through"

• adjective:   certain to occur; destined or inevitable

  Example: "He was certain to fail"

• adjective:   capable of being depended on

  Example: "A quick and certain remedy"

• adjective:   established irrevocably
• name:  A surname (very rare: popularity rank in the U.S.: #20995)

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