Security that is not threatened, there is no danger, harm, loss. The harmony of the overall living environment of human resources, not to harm each other, there is no risk of the dangers of the hidden dangers. Eliminating unacceptable risk of harm. The security is in the process of human production, operation of the system state of human life, property, environment that may arise below the level of damage control in human.
When "security" of the Chinese word for translation refers to the English, with their corresponding safety and security of two words, although the meaning and usage of these two words are different, but can be a different sense of the Chinese "safe" corresponds to. The word "security" associated with national security, is security. Explained in accordance with the English dictionary, the security has many meanings, which often study the national security experts and scholars referred to the meaning of two aspects, on the one hand, refers to the status of safety from danger, no fear; the other hand, refers to maintaining security, the security measures and security agencies.