Definition of "erewhile"

I am as fair now as I was erewhile.

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, (please specify the act number in uppercase Roman numerals, and the scene number in lowercase Roman numerals)

She runs you through, nor asks the word. / O thou, that dear and happy Isle, / The garden of the world erewhile, / Thou Paradise of the four seas / Which Heaven planted us to please,

1600s, Andrew Marvell A Garden

The dame sans merci's broken strain, / Whom I erewhile, perchance, have known, / When Orleans filled the Bourbon throne, / A siren singing by the Seine.

1800s, Oliver Wendell Holmes, The Flâneur

Quoth he to me, "Thou shalt fare with me to Cairo where dwelleth a friend of mine and to him will I give thee, for erewhile I promised him that on this voyage I would secure for him a fair woman for handmaid."

1885–1888, Richard F[rancis] Burton, transl. and editor, Supplemental Nights to the Book of the Thousand Nights and a Night […], Shammar edition, volume (please specify the volume), [London]: […] Burton Club […]