Mergers and acquisitions (abbreviated M&A) refers to the aspect of corporate strategy, corporate finance and management dealing with the buying, selling, dividing and combining of different companies and similar entities that can help an enterprise grow rapidly in its sector or location of origin, or a new field or new location, without creating a subsidiary, other child entity or using a joint venture. The distinction between a "merger" and an "acquisition" has become increasingly blurred in various respects (particularly in terms of the ultimate economic outcome), although it has not completely disappeared in all situations.

An acquisition is the purchase of one business or company by another company or other business entity. Consolidation occurs when two companies combine together to form a new enterprise altogether, and neither of the previous companies survives independently. Acquisitions are divided into "private" and "public" acquisitions, depending on whether the acquireee or merging company (also termed a target) is or is not listed on public stock markets. An additional dimension or categorization consists of whether an acquisition is friendly or hostile.