Definition of "begone"

Fairies be gone, and be alwaies away.

c. 1595–1596 (date written), William Shakespeare, “A Midsommer Nights Dreame”, in Mr. William Shakespeares Comedies, Histories, & Tragedies: Published According to the True Originall Copies (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act IV, scene i], page 157, column 1

"Begone! move quickly! if quickly you can, you that shine forth into sight in moist times like the worm."

1856, Herman Melville, The Lightning Rod Man