Real Dictionary

rally
countable noun: A rally is a large public meeting that is held in order to show support for something such as a political party.
verb: When people rally to something or when something rallies them, they unite to support it.
verb: When someone or something rallies, they begin to recover or improve after having been weak.

rally in American English 1
to gather together (retreating troops) so as to bring back into a state of order
intransitive verb: to come together for common action or effort
noun: a recovery from dispersion or disorder, as of troops
transitive verb: to bring into order again; gather and organize or inspire anew

rally in American English 2
to tease or mock playfully; ridicule; banter
transitive verb: to ridicule in a good-natured way; banter

rally in British English 1
noun: a large gathering of people for a common purpose, esp for some political cause
verb: to bring (a group, unit, etc) into order, as after dispersal, or (of such a group) to reform and come to order

rally in British English 2
verb: to mock or ridicule (someone) in a good-natured way; chaff; tease