| Term | Definition |
| Arthur Birling | the pompous, arrogant, head of the Birling family |
| Sybil Birling | Mr Birling's wife, tries to shirk off all blame. |
| Sheila Birling | gets Eva Smith fired from her job at Millingdales for being too pretty |
| Eric Birling | impregnates Eva and steals money from Mr Birling |
| Gerald Croft | has an affair with Eva during the previous summer |
| Inspector Goole | Represents Priestley's views in the play. |
| Eva Smith | Daisy Renton - a poor, working class girl whom the Birling family all have to do with her death. |
| Socialism | The belief where wealth should be shared for the good of the people. |
| Capitalism | The belief where money should be retained by the individual who makes it, for their own personal gain. |
| Upper | The class of the Birling family |
| Working | The class of Eva Smith |
| disinfectant | How Eva committed suicide. |
| Alderman | The position Meggarty has |
| bench | What Mr Birling sits on as he is a magistrate. |
| Palace Bar | The club where the prostitutes frequent. |
| squiffy | The word used to describe Eric's drunkenness |
| £50 | The amount Eric steals off his father. |
| 12.5% | The increase in labour costs due to Eva's plans. |
| ringleaders | The four or five people in charge of requesting more pay. |
| social context | the background to the play |