rain dance
noun1
A ceremonial dance intended to provoke rain.
- The women stripped naked and took part in a rain-dance, a girl being chosen for the sacrificial victim.1936, Rollo Ahmed, The Black Art, London: Long, page 180:
2
Climatology, Meteorology, Natural sciences Broadly Any sequence of actions performed in order to provoke rain.
3
Broadly Any sequence of arbitrary actions performed in order to achieve a goal.