migration
animal movement / human relocation / data transfer
[C/U] Both
pl: migrations
This term conveys a sense of large-scale, purposeful transition rather than random movement. It suggests a systemic shift where a significant portion of a population or a whole set of data moves from a point of origin to a destination, often driven by necessity, survival, or efficiency.
Countable when referring to a specific instance or a particular species' journey, such as the migration of the monarch butterfly. Uncountable when referring to the general phenomenon of people moving between countries.