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1. Defense of oneself when physically attacked: took a course in self-defense.
2. Defense of what belongs to oneself, as one's works or reputation.
3. Law The use of force against another person as permitted by the law when that person is perceived as presenting an immediate or imminent threat to one's own life or safety.

self′-de·fen′sive adj.
References in periodicals archive ?
Its flagship product, Jscrambler, is the world leader in JavaScript Application Security, making applications self-defensive and resilient to tampering and reverse-engineering on the client-side.
Pyongyang rejects the new sanctions, saying that the country's nuclear weapons were self-defensive deterrence against nuclear threats and blackmail of the US.
North Korea has also argued that the nuclear weapon tests are a self-defensive deterrence, not in contradiction of international law.
North Korea vowed Sunday to strengthen its self-defensive nuclear deterrence, rejecting the new U.
North Korea's nuclear weapons are a self-defensive deterrence not in contradiction of international law, its foreign ministry added.
We will further consolidate our self-defensive nuclear deterrence aimed at fundamentally eradicating the US nuclear threats, blackmail and hostile moves by establishing the practical balance of force with the US," the ministry said.
Should the United States and its followers try to enforce the naval blockade against our country, we will see it as an act of war and respond with merciless self-defensive counter-measures, as we have warned repeatedly," Korean Central News Agency reported on Friday, citing a foreign ministry spokesperson.
General Assembly in September, Foreign Minister Ri defended his country's missile and nuclear programs as a "righteous self-defensive measure" in the face of U.
The US "is trying to use Pyongyang's legitimate self-defensive measures as an excuse to strangle and completely suffocate it", the ministry noted.
The state-run KCNA news agency said Pyongyang would "not put our self-defensive nuclear deterrent on the negotiating table" while it faces threats from the US.
For all the affected apathy before the game and the self-defensive bravado of those saying defeat would put us out of our misery and hasten a summer clear out and radical rewiring actually it was unthinkable that Boro might lose to the worst team in the league.
Representative Marino said that he has publicly made it clear whenever theres a chance that the THAAD deployment is a self-defensive measure against North Korean threats, and that the US Congress is opposed to the Chinese sides economic retaliatory measures.