merger

noun

1. One that merges.
2. The act or process of merging two or more parts into a single unit.

   “Club mergers reduced the number of teams by half”

3. The legal union of two or more corporations into a single entity, typically assets and liabilities being assumed by the buying party.

   “The company has had some success with its EV offerings, such as the Nissan Leaf, an asset it brought to the table in merger discussions. EV development costs have created a powerful incentive for carmakers to explore mergers as a way to share the financial burden, according to analysts.”

4. An absorption of one or more estate(s) or contract(s) into one other, all being held by the same owner; of several counts of accusation into one judgement, etc.
5. A type of sound change where two or more sounds merge into one.

   “the cot-caught merger”

   “If the presence of *θ in Sardinian words of Punic origin is indeed taken as evidence for an affricated realization of Semitic *z, this implies that the variety of Punic, that was the source of the Sardinian punicisms, did not exhibit the merger of Semitic *s, *z, *ṣ, *ś into /s/.”