spooktacular adjective 1noun 1forms 3 adjective1 •(slang) Spooky and spectacular; wonderfully frightening. noun1 •(informal) A Halloween-themed event or episode.Ghostbusters: A Live Action Spooktacular features a breathtaking set as well as impressive stunt work and laser and ghost effects, but the show has yet to be fine-tuned. — 1990 formsspooktaculars · more spooktacular · most spooktacular