Killer

1. A killer is a person, animal, object, plant (&c.) that kills. See also assassin.
2. A killer is the lines, bars, grid, etc. applied to stamps on a letter to prevent their reuse (see also postmark).
3. Killer is a LRP game by Steve Jackson where players play assassins.
4. Killer[?] is the name of a psychobilly band.

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