Definition of "erstwhile" []

• In the past; at a former time; formerly. (adverb)
• Former: our erstwhile companions. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Quickly she called her erstwhile boyfriend Danny and warned him that the guy he found suspicious was now at another casino."
• "I called my erstwhile visitor and told him I was going after them."
• "Definition of 'erstwhile' - I thought it meant strong and steadfast, instead it means former."