[of.fi.ci.ate] vb -at.ed ; -at.ing vt (1631) 1: to carry out (an official duty or function)
2: to serve as a leader or celebrant of (a ceremony)
3: to administer the rules of (a game or sport) esp. as a referee or umpire ~ vi 1: to perform a ceremony, function, or duty "~ at a wedding"
2: to act in an official capacity: act as an official (as at a sports contest) -- of.fi.ci.a.tion n