Amalgamation, meaning to combine or unite into one form, has several uses:

• Amalgam, in chemistry, mining and dentistry, the result of the blending of mercury with another metal or alloy
• Almagamation (mining), the process of separation of precious metals from ore.
• Amalgamation, in business, the result of mergers of companies
• Amalgamation (music), the synthesis of sound events into an inter-parametric unit where parameters act together
• Amalgamation (politics), in politics, refers to the joining of two or more political units. See consolidated city-county or metropolitan municipality
• Free product with amalgamation, in group theory, an important construction