For Ever vs. Forever
“Forever” is the standard closed adverb in general English, while Cambridge also records the two-word “for ever” in UK English. The forms overlap in the adverbial sense; the closed form also has an attributive adjective use such as “forever home.”
Use “forever” as the broadly standard spelling. “For ever” is also established in UK English for the adverbial meaning “for all time”; keep the spelling consistent with your variety or house style.
Key details
Choose the right form
| Meaning / situation | Form / construction | Decision |
|---|---|---|
| general modern spelling for “for all time” | forever | Use the one-word form as the broad standard. |
| UK usage where the two-word adverbial spelling is chosen | for ever | The two-word form is also established in UK English. |
| fixed quotation or title | preserve original spelling | Do not silently normalize established wording. |
Quick tests
Meaning / construction test
Is a specific UK house style or source text using the two-word spelling?
If yes: Use “for ever” if that convention requires it.
If no: Use “forever” as the broadly standard spelling.
Caveat: The forms can express the same adverbial meaning; treat the difference mainly as regional/editorial spelling, not a semantic contrast.
Examples
The change will not last forever.
The one-word form is the broad modern default.
They promised to remain friends for ever.
The two-word form is established in UK English.
Preserve the original wording in a quotation.
Quoted text keeps its source spelling.
Further guidance
Core difference
“Forever” is the broadly standard closed form; “for ever” is an established UK variant when the expression functions adverbially.
Fast Test
For international/general prose, “forever” is the safest default; retain “for ever” when following UK usage or a house style that prefers it.
Usage Boundary
Do not claim that “for ever” is universally wrong. The two-word form is dictionary-recorded in UK English, while adjective uses such as “forever home” require the closed form.
Sources and evidence
Sources are shown with the role they play in this guide. Historical or style-sensitive claims are kept within the evidence boundary described above.
- Forever — Cambridge Dictionary (opens in a new tab)Cambridge University Press · Direct dictionary evidence that “forever” means for all time and that UK English also uses the two-word form “for ever.”