A monster is a legendary creature that inspires fear or horror. Often these fictional creatures turn out to be based on some scientific truth.
In some cases a first encounter with an alien can cause fear of monsters. (Star Trek: First Contact)
Many worlds have creatures that resemble Earth's sea monsters. (TAS: "The Ambergris Element"; VOY: "Thirty Days")
On Earth during the holiday of Halloween people often dress as various monsters. (TOS: "Catspaw")
The Bajoran people saw the Cardassians as monsters, something with which Tekeny Ghemor agreed. (DS9: "Ties of Blood and Water")
Charles Tucker III was a big fan of "monster movies".
Doctor Kila Marr called the Crystalline Entity that was responsible for her son's death a monster. (TNG: "Silicon Avatar")
After Jake Sisko saw his father Benjamin return to normal time, explaining it to Jadzia Dax made him feel "like a child insisting his parents check under his bed for monsters". (DS9: "The Visitor")
Julian Bashir once claimed that the word "monster" was "acceptable" in describing genetically engineered people. (DS9: "Doctor Bashir, I Presume")
Dukat was called a monster by several people, something he thought was unfair. (DS9: "Waltz", "Wrongs Darker Than Death or Night")
Neelix helped Naomi Wildman get to sleep by searching the quarters for monsters, even such places as the replicator. (VOY: "Mortal Coil")
Monsters
- Ardra (Ventaxian)
- Banshee (Human)
- Devil (Human)
- Dragon (Human)
- Fek'lhr (Klingon)
- Frankenstein's monster (Human)
- Godzilla (Human)
- Ghost (Various)
- Gremlins (Human)
- Grendel (Human)
- Kos'karii (Klingon)
- Loch Ness monster (Human)
- Morrok (Drayan)
- Vampire (Human; see Salt vampire, Vampire Vixens)
- Vihaar (Malon)
- Werewolf (Human)
- Witch (misinterpretation of a Human religion)
- Zombie (Human)
Monster movies
- Attack of the Lobster People
- Bride of the Corpse
- Night of the Killer Androids
- Orgy of the Walking Dead
- Revenge of the Creature