(1) Refers to the actual execution of a program. "At runtime" means while the program is running.
(2) Software that certain applications depend on to run in the computer. The runtime engine must be running in the computer in order for the application to execute. It provides common routines and functions that the applications require, and it typically converts the program, which is in an interim, intermediate language, into machine language. R:BASE Runtime is a separate product available for developers to distribute applications, but with the requirement that the users do will not have access to the development environment.
