Implementation is the realization (or making real) of an application, or making real: a plan, an idea, model, design, specification, standard, algorithm, or policy.
Implementation may be:
- Implementation (computer science), making real a technical specification or algorithm as a program, software component (or part of software), or other computer system through computer programming and letting the software be used by end users (or customers of the software).
- Implementation (political science), carrying out of - or making happen - public policy.