Someone who presides; a leader, an overseer, a president(noun)
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Use "presider" in a sentence
"President Bush likes to refer to himself as "The Decider" when, in fact, the Founders chose the word "President" because it comes from the term "presider" --- a much more modest post than the oneof unbridled power Bush has created for himself."
"WALLANDER: I just realized I failed to do one of my most important duties she presider, which is to remind you, please, to turn off your phones and BlackBerries if you haven't already."
"Guidelines, para.4 There is no 'presider' at a Mass in the Extraordinary Form, this is a term introduced with the new order of Mass."