A trope commonly seen in trailers for movies and video games as well as in the actual material where one of the first things shown to the viewer is the definition of an existing but uncommon word or one that solely exists within the fictional universe portrayed. Either way, the word tends to be central to the story. The definition tends to be formatted as if coming straight out of a dictionary or encyclopedia and may include a reference to an actual in-universe book.
Oftentimes the word will be an Arc Word.
- Lord Marksman and Vanadis anime adaptation offers "dictionary entry" cards each episode.
- The teaser trailer for Disney's Zootopia has the word "anthropomorphic" appear in large Courier typeface, which the red fox character pushes away. The narrator defines it as "a big, fancy word that means they walk around on two feet, they do not go to work nude ..." as key words from the definition appear on screen in the same type face. The definition never appears in its entirety as an actual dictionary entry though.
- Dogma opens with "Disclaimer: 1) a renunciation of any claim to or connection with; 2) disavowal; 3) a statement made to save one's own ass."
- Pacific Rim showed translations for the Japanese word "Kaiju" and the German word "Jaeger", the names for the monsters and mechas respectively.
- Pulp Fiction opens with both definitions of the word "pulp".
- Sicario opens with a black screen explaining in text what "sicario" means (it comes from a fanatical sect of Jews who knifed Roman occupiers and their collaborators in Judea, and it has come mean "hitman" in Mexico), though it's not in a dictionary structure.
- Twister opened with the dictionary definition of a tornado.
- The trailer for Vertigo opens with a zoom-up on the description of "Vertigo" in a dictionary.
- Alfred Hitchcock was also responsible for an Older Than Television example in Sabotage, with a close-up of a printed dictionary definition of "sabotage" at the very beginning.
- The Aggression Scale opens with the dictionary definition of "aggression scale": a four-part behavior rating scale used to evaluate and document the frequency and severity of aggressive episodes. The rating scale is made up of four categories; verbal aggression, aggression against objects, aggression against self, and aggression against others.
- Dragon Bones starts with "Hurog means dragon" under the chapter title, and the protagonist repeats the definition in an inner monologue on the second page. It foreshadows much of the plot.
- David Weber's The Apocalypse Troll uses definitions from the fictional "Webster-Wangchi Unabridged Dictionary of Standard English" as chapter epigraphs.
- The eighth Alex Rider book, Crocodile Tears, starts with a definition of its title as its epigraph. This was done at the insistence of author Anthony Horowitz's publishers, who felt the phrase was not in common use and most readers wouldn't understand what it meant, and initially wanted him to change the title completely. They eventually backed down but insisted on the inclusion of the definition at the beginning.
- Code Black opens with a definition of its title. ("An influx of patients so great, there aren't enough resources to treat them all.") It then explains that while the average ER is in Code Black five times a year, the hospital where the show takes place experiences that three hundred times a year.
- Every episode (there may have been exceptions) of CSI: Cyber opened with a hacking term significant to the episode and its definition.
- Halt and Catch Fire opens with the definition of its title:
HALT AND CATCH FIRE (HCF)
An early computer command that sent the machine into a race condition, forcing all instructions to compete for superiority at once.
Control of the computer could not be regained.
- The Mentalist season 1 starts with a black screen with the following text slowly fading in:
mentalist /'men-te-list/ noun. Someone who uses mental acuity, hypnosis and/or suggestion. A master manipulator of thoughts and behavior.
- PDF liner notes for the MP3 album Requiem Reimagined open with the definitions of the two words:
req´ · ui · em — a musical composition setting parts of a requiem Mass, or of a similar character. An act or token of remembrance.re · im · ag´ · ine — reinterpret (an event, work of art, etc.) imaginatively; rethink.
- The first teaser for the music video of BTS's "FAKE LOVE" (which contains scenes only made for the teaser itself) opens with the definition of "Magic Shop" (also one of the songs from the album "FAKE LOVE" comes from, LOVE YOURSELF: Tear), introducing the themes of the album as well as the themes of the story of the music video within this part of the BTS Universe:
'Magic Shop' is a psychodramatic technique that exchanges fear for a positive attitude.
- The music video of the Vocaloid song "Gift from the Princess Who Brought Sleep", from the "Seven Deadly Sins" sub-series of mothy's Evillious Chronicles series, opens with an entry from an English-to-Japanese dictionary defining the word "gift", which is also the Gratuitous English Arc Word of the song. Or so it seems. About halfway through the video, the dictionary entry is shown again, only to be replaced with a German-to-Japanese dictionary entry — and in German, "Gift" means "poison".
- Early videocassette releases from Cabin Fever Entertainment had their Vanity Plate preceded by the definition for "cabin fever".
- The Hope trailer for The Witcher 2: Assassins of Kings.
WITCHERS, so called by the Nordlings (q.v.), were an elite and mysterious caste of warrior-monks. They are portrayed in popular lore as possessing magic powers and superhuman abilities. W. were believed to combat evil spirits, beasts and all manner of dark forces. In reality (...) w. served the monarchs of the North in the tribal wars they waged against one another.
- The trailer for the 3DS remake for Xenoblade.
The Monado - a divine sword capable of disturbing the very fabric of existance.
- Each chapter of Astral Chain is given a one-word title. Accompanying each title is a definition for the word used on the title card.
- Xenophobe displays this text during Attract Mode, and, with slightly different wording, on the arcade cabinet's control panel as well:
One who has a deathly fear of anything alien
- The U.S. cover for Odium includes a dictionary definition of the title (and the title itself is spelled with accent marks and a syllable divider, the way it would be in a dictionary headword):
ōdi∙um n. def. - hate coupled with disgust
- Yu-Gi-Oh! The Abridged Series: The Pyramid of Light movie starts with giving the definition of "abridged", then of Yu-Gi-Oh!.
- Whateley Universe: In Test Tube Babies:
test: n., an examination or evaluationtube: n., slang term for television or video-related imagerybabies: n., colloquially, neophytes or tyros