adjective
erstwhile
URST-wyle
Erstwhile (adjective) means Former; belonging to an earlier time and no longer holding the position or relationship described. Example: “Her erstwhile business partner now runs a rival firm.”
adjective
1
formal or literary Former; belonging to an earlier time and no longer holding the position or relationship described.
"Her erstwhile business partner now runs a rival firm."
"The two erstwhile allies barely speak."
adverb
1
archaic Formerly; at a time in the past.
"The hall, erstwhile a chapel, is now a concert venue."
How to use erstwhile
Learner’s notesIn plain EnglishUsed to describe someone or something that used to be a particular thing but isn't any more.
When to use it
Literary. Overused in journalism, where plain 'former' usually reads better.
Memory tip
Only ever use it to mean 'former'; it carries no praise and no sense of duration.
Trace the full origin ↓
Easily confused with
Common pairings
erstwhile colleague
erstwhile ally
erstwhile rival
erstwhile home
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Her _____ business partner now runs a rival firm.
Etymology
From Old English ǣrest ('earliest'), the superlative of ǣr ('before'), combined with 'while'.
Synonyms
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Related words
Rhymes for erstwhile
See all rhymes for erstwhile →Frequently asked questions
What is the difference between 'erstwhile' and 'former'?
They mean the same thing, but 'erstwhile' is markedly more literary and slightly old-fashioned, so it stands out in plain prose. 'Former' is the neutral everyday choice and is almost always safer in business or news writing.
Does 'erstwhile' mean 'esteemed' or 'longtime'?
No, and this is the commonest error. 'Erstwhile' means only 'former'; calling someone 'our erstwhile colleague' says they no longer work with you, not that you value them. If you mean 'respected' use 'esteemed', and if you mean 'of long standing' use 'longtime'.
Can 'erstwhile' be used after the noun?
Not naturally. As an adjective it goes before the noun ('his erstwhile rival'), and the adverbial use after a noun ('the hall, erstwhile a chapel') now reads as deliberately archaic.
What is the meaning of erstwhile?
"erstwhile" (adjective) means former; belonging to an earlier time and no longer holding the position or relationship described.
