Here you will find one or more explanations in English for the word Assassin.
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Assassin
Assassin As*sas"sin, n. [F. (cf. It. assassino), fr. Ar.
`hashishin one who has drunk of the hashish. Under its
influence the Assassins of the East, followers of the Shaikh
al-Jabal (Old Man of the Mountain), were said to commit the
murders required by their chief.]
One who kills, or attempts to kill, by surprise or secret
assault; one who treacherously murders any one unprepared for
defense.
Assassin
Assassin As*sas"sin, v. t.
To assassinate. [Obs.] --Stillingfleet.
Meaning of Assassin from wikipedia