a single computer instruction which symbolizes, and is converted at the time of program execution or by a compiler into, a series of instructions in the same computer language. [WordNet 1.5]
A keystroke (or combination of keystrokes) which symbolizes and is replaced by a series of keystrokes; -- a convenient feature of some advanced programs, such as word processors or database programs, which allows a user to rapidly execute any series of operations which may be performed multiple times. Such macros may typically be defined by the program user, without rewriting or recompiling the program. [PJC]
macro, a.
very large in scale or scope or capability; as, macroeconomics. [WordNet 1.5]