A ritual, with religious or cultural significance. / An official gathering to celebrate, commemorate, or otherwise mark some event.

The act of certifying. / The granting of a certificate. / A professional qualification that certifies a person's ability.

(physiology) The localization of the control of special functions, as of sight or of the various movements of the body, in special regions of the brain.

In a way which is certain; with certainty. / Without doubt, surely. / An emphatic affirmative answer; of course.

(US) A person accredited by the American Board of Safety Professionals, the certification board for safety professionals in the United States, and designated by the letters CSP after his or her name.

(transitive) To attest to (a fact) as the truth. / (transitive, law) To authenticate or verify in writing.

A document containing a certified statement. / A document evidencing ownership or debt.

To supply with a certificate, especially following certification.

(informal) A practically guaranteed outcome.

Someone who acts as a host at a formal event. / Someone who conducts a programme of varied entertainment, for example by introducing performers to the audience. / (rap music) A rapper.