What does defend mean?
Defend is a versatile verb meaning to protect someone or something from harm, attack, or danger, and, more broadly, to support a person, idea, or position against criticism or challenge. A soldier may defend a city; a lawyer defends a client; a scholar defends an argument. The word carries connotations of loyalty, courage, and justified resistance — to defend something implies that it deserves protection. It appears in everyday speech as well as in legal, military, sporting, and academic contexts: athletes defend titles, defendants are defended in court, and governments defend their policies. Derived forms such as defender, defense (or defence), defensive, and defensible are common across English. Because it spans both physical protection and verbal advocacy, defend is one of the most useful verbs for expressing active support in the face of opposition.
verbTo protect someone or something from harm or attack, or to support and justify a person, idea, or position against criticism or opposition.
- To protect from physical harm, danger, or attack.
- To argue in support of someone or something against criticism, accusation, or challenge.
- (Law) To act as counsel for an accused person, or (Sports) to attempt to retain a title or prevent opponents scoring.
"The soldiers defended the city against the invading army."
"She defended her thesis before a panel of skeptical examiners."
"The fortress was built to defend the harbor from naval assault."
Every time you defend something, you're literally 'striking away' its attackers — the word comes straight from Latin for fending off blows.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of defend
Defend comes from Latin defendere, formed from de- ('away, from') plus fendere ('to strike'), giving the original sense of striking away an attacker. It entered English via Old French defendre around the late Middle Ages, initially carrying both military and legal senses. It shares this Latin root with fence (a shortened form of defense) and with offend (ob-fendere, 'to strike against'), making them distant cousins rather than unrelated words.
Related word forms
How defend is actually used
'Defend' is standard in both formal and informal registers. In legal contexts it carries a specialized meaning (acting for the defense), and in sports it refers to protecting a lead or title. The spelling of the noun differs by region: 'defense' in US English, 'defence' in British English.
Easily confused with defend
'Defend' means to protect or support, while 'defer' means to delay or yield to another's judgment.