rally

noun
A mass meeting of people making a political protest or showing support for a cause. (a rally attended by around 100,000 people)
A competition for motor vehicles in which they are driven a long distance over public roads or rough terrain, typically in stages and through checkpoints. (a rally driver)
A quick or marked recovery after a reverse or a period of weakness. (the market staged a late rally)
(in tennis and other racket sports) an extended exchange of strokes between players. (a rally of more than three strokes was a rarity)