Definition of "weyward"

Whiles I ſtood rapt in the wonder of it, came Miſſiues from the King, who all-hail'd me Thane of Cawdor, by which Title before, these weyward Sisters saluted me, and referr'd me to the comming on of time, with haile, King that ſhalt be.

c. 1606 (date written), William Shakespeare, “The Tragedie of Macbeth”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act I, scene v], page 134, column 1