come on the scene Definition

scene¹
noun

1. The setting in which a real or imaginary event takes place.

Thesaurus: setting, set, scenery, backdrop, background, ambiance, environment.
2. The representation of action on the stage.
3. A division of a play, indicated by the fall of the curtain, a change of place or the entry or exit of an important character. Compare act noun 5.
4. A unit of action in a book or film.
5. Any of the pieces making up a stage or film set, or the set as a whole.
6. A landscape, situation or picture of a place or action as seen by someone.

Example: A delightful scene met their eyes
Thesaurus: landscape, view, prospect, picture, tableau, panorama.
7. An embarrassing and unseemly display of emotion in public.

Example: make a scene
Thesaurus: spectacle, exhibition, display, commotion, outburst, episode, incident, outburst, sight, tantrum, to-do.
8. colloq
The publicity, action, etc surrounding a particular activity or profession.
Example: the current music scene
9. colloq
A liked or preferred area of interest or activity.
Example: Rock concerts are just not my scene
10. colloq
A situation or state of affairs.
Example: That's the scene in Europe at the moment

Idiom: behind the scenes

Out of sight of the audience; backstage.

Unknown to the public; in private.

Idiom: come on the scene

To arrive; to become part of the current situation.
Example: Everything was fine until he came on the scene

Idiom: set the scene

To describe the background to an event.

Etymology: 16c: from Latin scena, from Greek skene tent or stage.