Definitions for eyewitnessˈaɪˈwɪt nɪs
Random House Webster's College Dictionary
a person who actually sees some act, occurrence, or the like, and can give a firsthand account of it.
(v.t.)to view as an eyewitness.
Origin of eyewitness:
a spectator who can describe what happened
be present at an event and see it with one's own eyes
Someone who sees an event and can report or testify about it.
To be present at an event, and see it
Origin: From eye + witness
one who sees a thing done; one who has ocular view of anything