Definitions of moderate:

• noun:   a person who takes a position in the political center
• verb:   preside over

  Example: "John moderated the discussion"

• verb:   make less fast or intense

  Example: "Moderate your speed"

• verb:   make less strong or intense; soften
• verb:   restrain or temper
• verb:   make less severe or harsh

  Example: "He moderated his tone when the students burst out in tears"

• verb:   lessen the intensity of; temper; hold in restraint; hold or keep within limits

  Example: "Moderate your alcohol intake"

• adjective:   not extreme

  Example: "A moderate penalty"

• adjective:   being within reasonable or average limits; not excessive or extreme

  Example: "Moderate prices"

• adjective:   marked by avoidance of extravagance or extremes

  Example: "Moderate in his demands"