Definition from Wiktionary, the free dictionary
eyewitness (plural eyewitnesses)
- Someone who sees an event and can report or testify about it.
1915, Edgar Rice Burroughs, The Return of Tarzan:
- And the girl's fate he could picture as plainly as though he were an eyewitness to it.
person who has seen and testify about an event
- To be present at an event, and see it