referee >> rɛfəˈriː
Definition: [noun] an official who watches a game or match closely to ensure that the rules are adhered to and (in some sports) to arbitrate on matters arising from the play.
Example: the referee sent off two French players
Definition: [noun] a person willing to testify in writing about the character or ability of someone, especially an applicant for a job.
Example: the subject of a bad reference can sue the referee for libel
Definition: [verb] act as the referee of.
Example: he refereed two of the first-round group matches