Pursuance (noun)

1. The act of pursuing or following through with something.
2. The continuation or carrying out of an action or plan.
3. The state of being actively engaged in a pursuit or undertaking.

Origin:

From middle english pursuiance, from old french poursuivance, from poursuivre ("to pursue").

Examples:

1. In pursuance of his goal, he worked tirelessly for months.
2. The company"s success was the result of the CEO"s relentless pursuance of her vision.
3. The project was completed in pursuance of the deadline.
4. The legal case was won after years of pursuance.
5. In pursuance of his dream, he quit his job and started his own business.