adv. [ AS. hwīlum, properly, at times, dative pl. of hwīl; akin to G. weiland formerly, OHG. hwīlōm, See While, n. ] Formerly; once; of old; erewhile; at times. [ Obs. or Poetic ] Spenser. [ 1913 Webster ]

Whilom, as olde stories tellen us,
There was a duke that highte Theseus. Chaucer. [ 1913 Webster ]