Dictionary and Thesaurus

Definition of Security

• (n.) The condition or quality of being secure; secureness.
• (n.) Freedom from apprehension, anxiety, or care; confidence of power of safety; hence, assurance; certainty.
• (n.) Hence, carelessness; negligence; heedlessness.
• (n.) Freedom from risk; safety.
• (n.) That which secures or makes safe; protection; guard; defense.
• (n.) Something given, deposited, or pledged, to make certain the fulfillment of an obligation, the performance of a contract, the payment of a debt, or the like; surety; pledge.
• (n.) One who becomes surety for another, or engages himself for the performance of another's obligation.
• (n.) An evidence of debt or of property, as a bond, a certificate of stock, etc.; as, government securities.

Synonyms of Security

• Protection
• Certificate
• Surety
• Security Department
• Surety
• Security System
• Security Measure
• Security Measures

Antonyms of Security

• Insecurity

Homophones of Security