Definition of republicanize in US English:

republicanize

(also republicanise)

verb

  • 1with object To make republican in principles or character; to convert into a republican form; to alter or reorganize on republican principles.

  • 2no object To show republican tendencies; to become republican in character or form.

Origin

Late 18th century. From republican + -ize, originally after French républicaniser to make republican, to show republican tendencies.