terminator

noun6

1. •
   Someone who terminates or ends something, especially (in later use) an assassin or exterminator.
2. •
   An intelligent android created to destroy humans.
3. •
   The line between the day side and the night side of a moon, planet or other celestial body.

   • Another view captured by Wiseman shows the Earth divided by night and day. That frontier between light and darkness is known as the terminator. — 2026
4. •
   A text character or string that serves to mark the end of a document or transmission.
5. •
   A DNA sequence that causes RNA transcription to cease and an mRNA transcript to break off.
6. •
   An electrical device that absorbs reflection at the end of a transmission line.