| No. | Term | Definition |
|---|---|---|
| 1. | A.V. Club | School club for audio-visual projects. |
| 2. | Alexei | Russian scientist who loves cherry Slurpees. |
| 3. | Alphabet Wall | Letters Joyce uses to talk with Will. |
| 4. | American | Mysterious prisoner referenced by Russians. |
| 5. | Arcade | Hangout featuring Dragon’s Lair and Dig Dug. |
| 6. | Argyle | Jonathan’s stoner friend; pizza delivery driver. |
| 7. | Barb Holland | Nancy’s best friend; killed in Season 1. |
| 8. | Benny Hammond | Diner owner who helps Eleven early. |
| 9. | Billy Hargrove | Max’s abusive stepbrother, later possessed. |
| 10. | Bitchin’ | Slang meaning excellent; often used by characters. |
| 11. | Bob Newby | Joyce’s boyfriend; heroic RadioShack manager. |
| 12. | Brain | Mind flayer target for control and spying. |
| 13. | Brenner, Dr. | Hawkins Lab director; ‘Papa’ to Eleven. |
| 14. | Byers House | Home where Will first disappears. |
| 15. | Camp Know Where | Dustin’s summer camp where he meets Suzie. |
| 16. | Castle Byers | Will’s backyard fort and safe haven. |
| 17. | Cerebro | Dustin’s radio for long-distance communication. |
| 18. | Chrissy Cunningham | Cheerleader and Vecna’s first Season 4 victim. |
| 19. | Christmas Lights | Joyce’s alphabet wall communication system. |
| 20. | Code Red | Hopper’s emergency plan for trouble. |
| 21. | D’Artagnan | Dustin’s pet Demogorgon, nicknamed Dart. |
| 22. | D&D | Game framing friendships, quests, and monsters. |
| 23. | Demobats | Bat-like creatures serving Vecna. |
| 24. | Demodog | Juvenile Demogorgon from Hawkins Lab. |
| 25. | Demogorgon | Predatory monster from the Upside Down. |
| 26. | Dragon’s Lair | Arcade game Max dominates. |
| 27. | Dustin Henderson | Curly-haired strategist; loves science and monsters. |
| 28. | Eddie Munson | Hellfire Club leader blamed for murders. |
| 29. | Eggo | Waffles Eleven adores. |
| 30. | Eleven (El) | Psychic girl with telekinesis and trauma. |
| 31. | Enzo’s | Murray and Joyce meet Yuri there. |
| 32. | Erica Sinclair | Lucas’s sister; sharp, fearless, funny. |
| 33. | Experiment Numbers | Lab children labeled by numerical designations. |
| 34. | Flayed | People possessed by Mind Flayer. |
| 35. | Fort Byers | Another name for Castle Byers. |
| 36. | Gaten Matarazzo | Actor who plays Dustin Henderson. |
| 37. | Gateway | Portal between Hawkins and Upside Down. |
| 38. | Ghostbusters | Season 2 Halloween costumes for the boys. |
| 39. | Grigori | Soviet enforcer who hunts Hopper. |
| 40. | Hawkins | Small Indiana town hiding supernatural secrets. |
| 41. | Hawkins High | School attended by the main teens. |
| 42. | Hawkins Lab | Secret facility conducting psychic experiments. |
| 43. | Hellfire Club | Eddie’s D&D club at Hawkins High. |
| 44. | Hopper, Jim | Hawkins chief; surrogate father to Eleven. |
| 45. | Indiana | State where Hawkins is located. |
| 46. | Jonathan Byers | Will’s brother; photographer and protector. |
| 47. | Joyce Byers | Will’s mother; relentless, brave, intuitive. |
| 48. | Kali (008) | Illusionist lab escapee; meets Eleven. |
| 49. | Karen Wheeler | Mike’s mom; notices odd things. |
| 50. | Karen’s Pool | Season 3 setting for Billy subplot. |
| 51. | Kate Bush | Artist of Max’s lifesaving song. |
| 52. | Kurt the Cat | Dustin’s missing cat, eaten by Dart. |
| 53. | Lucas Sinclair | Pragmatic friend; later dates Max. |
| 54. | Mall Rats | Teens hanging at Starcourt Mall. |
| 55. | Max Mayfield | Skater girl; targeted by Vecna. |
| 56. | Mike Wheeler | Leader of the Party; loves Eleven. |
| 57. | Mind Flayer | Hive-mind entity controlling Upside Down. |
| 58. | Mirkwood | D&D name for the Upside Down. |
| 59. | Murray Bauman | Conspiracy theorist who helps Joyce and Hopper. |
| 60. | Music Box | Max’s memory anchor against Vecna. |
| 61. | Nail Bat | Steve’s iconic spiked weapon. |
| 62. | Nancy Drew | Nickname for Nancy’s investigative streak. |
| 63. | Nancy Wheeler | Investigative older sister; fights monsters. |
| 64. | NeverEnding Story | Duet Suzie and Dustin sing. |
| 65. | Nina Project | Program to restore Eleven’s powers. |
| 66. | Ovation Guitar | Eddie’s instrument for Master of Puppets. |
| 67. | Owens, Dr. | Brenner’s rival; aids the kids. |
| 68. | Palace Arcade | Hawkins arcade where kids meet. |
| 69. | Papa | Eleven’s name for Dr. Brenner. |
| 70. | Party | Core friend group; their chosen-family team. |
| 71. | Piggyback | Plan to reach Vecna through minds. |
| 72. | Pineapple Pizza | Argyle’s preferred Surfer Boy topping. |
| 73. | Possession | Mind Flayer controlling humans via spores. |
| 74. | Rift | Tear between worlds caused by Vecna. |
| 75. | Rink-O-Mania | Roller rink where Eleven is humiliated. |
| 76. | Robin Buckley | Steve’s coworker; brilliant, quirky, lesbian. |
| 77. | Russians | Cold War adversaries building secret portal. |
| 78. | Sam Owens | Full name of Dr. Owens. |
| 79. | Scoops Ahoy | Ice cream shop; Steve and Robin work. |
| 80. | Shadow Monster | Early name for the Mind Flayer. |
| 81. | Starcourt Mall | Mall hiding a Russian base. |
| 82. | Steve Harrington | Babysitter-hero with a nail bat. |
| 83. | Stranger Things | Netflix series of 80s sci-fi horror. |
| 84. | Surfer Boy Pizza | Argyle’s workplace and delivery van. |
| 85. | Suzie | Dustin’s girlfriend; sings to save everyone. |
| 86. | Telekinesis | Eleven’s power to move objects with mind. |
| 87. | The Creel House | Vecna’s lair in Hawkins. |
| 88. | The Gate | Major portal opened by Eleven. |
| 89. | The Snow Ball | Season 2 dance; Eleven and Mike kiss. |
| 90. | The Upside Down | Dark mirror world infecting Hawkins. |
| 91. | Vecna | Henry Creel; main Season 4 villain. |
| 92. | Victor Creel | Vecna’s father; imprisoned after tragedies. |
| 93. | Vines | Upside Down tendrils that ensnare victims. |
| 94. | Walkie-Talkies | Kids’ main communication tool. |
| 95. | Will Byers | Boy abducted; linked to Mind Flayer. |
| 96. | Winona Ryder | Actor who plays Joyce Byers. |
| 97. | Wormgate | Slang for a small portal opening. |
| 98. | X-Men | Referenced to explain Eleven’s powers. |
| 99. | Yuri Ismaylov | Smuggler who betrays Joyce and Murray. |
| 100. | Zombies | Dustin’s nickname for possessed flayed people. |