Can you give us more context or where you heard this (I'm guessing it's something related to C++ because you specified so). You might not have much luck with such questions over here, I think that term is a game making terminology in general.. and here you will find more programmers than game developers. But there are separate forums for game developers you might find some helpful people there ;)
From my common knowledge a scene is a fixed frame or map. Suppose you're in the first level of mario that's a scene and second level is another scene. Or it could just be one frame.
Hey that's my assumption don't take it seriously, or at least that's how it works with animation. Hmm want to be a game developer eh? ;) Good luck with that!
That's why I asked for context and "I think that term is a game making terminology in general.."
How do you know scene graph is the scene he is talking about? What is a 'scene' (not screen graph) according to your link? And can you give two examples of a 'scene'?
A scene graph is a data structure that defines relationships (physical or logical) between a subset of objects/entities/things in the current "area" or "world". Correspondingly, the scene is the set of objects/entities/things in the current "area" or "world", and the relationships between them.