Word of the day, Erstwhile Our word of the day from The Arbiter is Erstwhile Meaning of Erstwhile Former or in the past. It's used to refer to something or someone that used to be in a particular role or state but is no longer. Synonyms of erstwhile - Previous - One-time - Ex- - Bygone - Old READ ALSO: Word of the day, Sanctity Pronunciation of erstwhile URST-while Example Unfortunately for both gladiators, the PDP—rendered powerless by Wike and supported by his erstwhile minions like Fubara—was of no help. Share with us a sentence with the word erstwhile. Let's see how well you...