Definition of "yesterdays"

And all our yesterdayes, haue lighted Fooles / The way to dusty death.

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 V, scene v], page 150, column 1