yester

adjective Archaic.

1. of or relating to yesterday.

1. a combining form, now unproductive, occurring in words that denote an extent of time one period prior to the present period, the nature of the period being specified by the second element of the compound: yesterweek.

adjective

1. archaic of or relating to yesterdayyester sun Also: yestern (ˈjɛstən)

prefix

1. indicating the day before todayyesterday
2. indicating a period of time before the present oneyesteryear