#1 moderate n. [centrist, middle of the roader, moderationist] a person who takes a position in the political center. wn
#2 moderate v. [chair, lead] preside over; "John moderated the discussion". wn
#3 moderate v. make less fast or intense; "moderate your speed". wn
#4 moderate v. [control, hold in, hold, contain, check, curb] lessen the intensity of; temper; hold in restraint; hold or keep within limits; "moderate your alcohol intake"; "hold your tongue"; "hold your temper"; "control your anger". wn
#5 moderate s. [restrained] marked by avoidance of extravagance or extremes; "moderate in his demands"; "restrained in his response". wn
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