Defence and defense are two spellings of the same word, meaning “protection” or “guarding against harm.” The only difference is regional spelling.
The rule is straightforward: American English prefers defense, while British English prefers defence.
Defence vs. Defense
The Core Rule
- Defense → Preferred in American English.
- Defence → Preferred in British English and other Commonwealth countries.
Memory Trick:
- DefenSe → States (United States)
- DefenCe → Commonwealth (UK, Canada, Australia)
Meaning and Usage
Both spellings function as nouns and mean the same thing:
- Protection against attack
- Arguments used to justify or protect someone
- A strategy used to stop an opponent in sports
General examples:
- The castle was built for defense/defence.
- She spoke in her own defense/defence.
- The team has a strong defense/defence.
Important Suffix Rule
When adding suffixes like -ive or -ible, the spelling always uses S, regardless of region:
- defensive
- defensible
No standard variety of English spells these words with a “c.”
Quick Comparison Table
| Word | American English | British English |
|---|---|---|
| Defense | Preferred | Not standard |
| Defence | Not standard | Preferred |
| Defensive / Defensible | Always with “S” | Always with “S” |
Final takeaway:
- Defense = American English.
- Defence = British English.
Same meaning. Different spelling traditions. Stay consistent with your audience.
Last Updated on March 3, 2026
English Teacher | IELTS Instructor | English Learning Content Creator at ESLTeacher.org
Nhat Nhat is an English teacher and IELTS instructor specializing in grammar, academic writing, and English learning resources. He holds a Bachelor’s Degree in English Education from Hanoi National University of Education (HNUE), an IELTS 8.0 certificate, and TESOL / TEFL teaching certifications. With over 9 years of teaching experience, he creates practical lessons and educational content to help learners improve their English skills and exam performance.
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