Definition

to certify: to authenticate, to confirm, to guarantee, to assure verb
I can certify that it's a real Picasso. I can assure you it's absolutely genuine.
certified: accredited, authorized, qualified, registered adjective
Did you send the package by certified mail? It won't arrive unless you sent it by registered post.
  • "I am a stress management expert, as well as a certified crisis counselor."
  • "Donny is licensed to fly and certified to teach in single and multi-engine airplanes, as well as helicopters, gliders, hot air balloons and UFOs."
  • "Glen : Well, I have a bachelor's degree in accounting, a masters in linguistics, a doctorate in philosophy and I'm a certified yoga instructor."
  • "In case that doesn't work, I'm also a certified suicide hotline technician."
  • "I am a licensed and certified psychologist."
  • "I'm sure that we can find legitimate production sources without becoming certified."
  • "In earlier conversations, Susie, Bruno and Philip discussed the possibility of using a subcontracting partner certified by OILS."
  • "OILS, the Organization for International Labor Standards, is a (fictional) group which identifies and certifies subcontractors using legal and ethical labor practices."
  • "Certified in CPR"

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