Consolidation (noun)

1. The action or process of combining a number of things into a single more effective or coherent whole.
2. The strengthening of a person's position or power.
3. The process of becoming more stable or united.

Origin:

From latin consolidatus ('made firm, established, solidified'), from con- ('together') + solidare ('to make solid').

Examples:

1. The consolidation of the company's various divisions resulted in increased efficiency.
2. The political party sought consolidation of power by winning a majority in parliament.
3. The marriage marked the consolidation of their relationship.