• Cell fusion, an event in the maturation of cells
• Melting, a chemistry term for a solid undergoing a phase change into a liquid
• Gene fusion, a genetic event and molecular biology technique
• Nuclear fusion, the process by which multiple nuclei join together to form a heavier nucleus
• Fusion power, power generation using controlled nuclear fusion reactions
• Fusion , a type of synthetic language
• Fusion cuisine, the combination of elements of various culinary traditions
• Spinal fusion, a surgical technique used to combine two or more vertebrae
• Tooth fusion, the joining of two teeth

Business

• BT Fusion, a UK voice-over-IP service
• Fusion, an oil company that contributes to the economy of Mauritania

Computers and software

• AMD Fusion, a future next-generation microprocessor design
• Compiz Fusion, a community maintained set of plugins for the Compiz Window Manager
• ColdFusion, a rapid application development platform
• Exterro Fusion, a software company based in Portland, Oregon
• Eyeon Fusion, a visual effects package
• Fusion engine, a game engine developed by Outrage Entertainment.
• Fusion RTOS, an embedded or real-time operating system
• Fusion WebPilot browser, an embedded web browser
• IBRIX Fusion, a highly scalable parallel file system
• Kega Fusion, a Sega multi-console emulator
• Loop fusion, a compiler optimization which replaces multiple loops with a single one
• Microcode Solutions Fusion, a popular Macintosh Emulator for Amiga computers
• NetObjects Fusion, a web design program
• Oracle Fusion Middleware, a portfolio of standards-based software products that spans multiple services
• Sensor fusion, the combining of sensory data or data derived from sensory data from disparate sources
• VMware Fusion, virtual machine software product by VMware, Inc.
• Fusion Systems, an IT consulting firm based in Tokyo, Hong Kong and Shanghai

Entertainment

• Dancing Stage Fusion, a music video game by Konami
• Fusion, a combat technique in Dragon Ball that merges two or more people into a single, more powerful individual
• Fusion , a 1961 album by Jimmy Giuffre
• Fusion , there have been several entities in comics named Fusion
• "Fusion" , a first season episode of Star Trek: Enterprise
• Fusion , a music genre which combines two or more other genres
• Fusion (Sven Väth album), a 1998 album by Sven Väth
• Fusion Cosmetics on the soap opera All My Children
• Fusion Magazine , a comedy magazine founded and edited by Glenn Beck
• Fusion Magazine , predecessor to 21st Century Science and Technology magazine
• Fusion Radio, an Internet radio station broadcasting from the University of Toronto
• Fuzion, a merger of Interlock System and Hero System
• Guardian , Christian rock band previously known as "Fusion"
• Jazz fusion or jazz-rock fusion
• Metroid Fusion, a 2002 Game Boy Advance game

Law

• Fusion of law and equity refers to combining the rules of equity and common law into one coherent set of rules

Politics and organisations

• Electoral fusion, an arrangement where two or more political parties support a common candidate
• Fusion of Haitian Social Democrats, a Haitian political party
• Fusion , a Christian charity that serves, supports and resources students
• Fusion International, an Australian-based Christian organisation
• Fusionism , the combination of libertarianism and various types of conservatives
• Sarvodaya Fusion, the ICT for Development movement of Sarvodaya, Sri Lanka.
• Fusion Energy Foundation, a defunct part of the LaRouche movement and publisher of Fusion

Products

• Gillette Fusion, a safety razor by Gillette
• Schumacher Fusion, a radio-controlled car
• Ford Fusion, two separate automobile product lines from Ford Motor Company
  • a Mini MPV sold in Europe
  • a mid-size car sold in North America

Sports

• Cleveland Fusion, a women's American football team in the NWFA
• Miami Fusion, a professional soccer (football) club located in Fort Lauderdale

See also

• Merger