Backward vs. Backwards
Cambridge marks adverbial “backwards” as mainly UK and notes that US English usually uses “backward.” The guide treats the choice as a documented variant boundary rather than assuming that one form is universally incorrect.
For the directional adverb, both occur; “backwards” is mainly UK, while US English usually prefers “backward.”
Key details
Choose the right form
| Context | Choice | Boundary |
|---|---|---|
| US directional adverb | backward | usual US preference |
| mainly UK directional adverb | backwards | documented mainly UK form |
| adjective before a noun | backward | do not infer adverb variation automatically |
Quick tests
Regional-adverb test
Is the word a directional adverb, and does the document follow a US or UK convention?
If yes: Use the regional form expected by that convention; US normally prefers “backward,” while “backwards” is mainly UK.
If no: If the word is not the directional adverb, decide from that grammatical use rather than applying this guide mechanically.
Caveat: The reviewed evidence establishes a regional boundary for the adverb; it does not make either adverb universally wrong.
Examples
She stepped backward to make room.
US English commonly prefers the directional adverb “backward.”
She stepped backwards to make room.
“Backwards” is a documented mainly UK directional adverb.
Both directional adverb forms can be standard when they match regional usage.
The decision is regional/style based, not a universal correctness split.
Further guidance
Core difference
The directional adverb expresses movement or orientation toward the back.
Style Boundary
Do not extend the adverb preference mechanically to every adjective or fixed expression; follow the sense and house style.
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.
- Backwards — Cambridge Dictionary (opens in a new tab)Cambridge Dictionary · Backwards as mainly UK form and backward as usual US form