Definitions for "Immediate mode"
In BASIC, the mode where the input line is not preceded by a line number. BASIC immediately executes the line.
A mode used by certain API functions that produces immediate drawing without invoking a draw function.
Execution of OpenGL commands when they're called, rather than from a display list. No immediate-mode bit exists; the mode in immediate mode refers to use of OpenGL, rather than to a specific bit of OpenGL state.
Keywords:  press, screen, get, return, running
Using the computer without running a program. For example, if you type in PRINT 3 + 2 and then press RETURN, you will get a result of 5 on the screen immediately.