Definitions
1.NounSomeone who terminates or ends something, especially (in later use) an assassin or exterminator. .mw-parser-output .defdate{font-size:smaller}
2.NounA text character or string that serves to mark the end of a document or transmission.
3.NounThe line between the day side and the night side of a moon, planet or other celestial body.
4.NounA DNA sequence that causes RNA transcription to cease and an mRNA transcript to break off.
5.NounAn electrical device that absorbs reflection at the end of a transmission line.
6.NounAn intelligent android created to destroy humans.