noun se·cu·ri·ty \si-ˈkyr-ə-tē\

: the state of being protected or safe from harm

: things done to make people or places safe

: the area in a place (such as an airport) where people are checked to make sure they are not carrying weapons or other illegal materials

plural se·cu·ri·ties

Full Definition of SECURITY

:  the quality or state of being secure: as
a :  freedom from danger :  safety
b :  freedom from fear or anxiety
c :  freedom from the prospect of being laid off <job security>
a :  something given, deposited, or pledged to make certain the fulfillment of an obligation
b :  surety
:  an instrument of investment in the form of a document (as a stock certificate or bond) providing evidence of its ownership
a :  something that secures :  protection
b (1) :  measures taken to guard against espionage or sabotage, crime, attack, or escape
(2) :  an organization or department whose task is security

Examples of SECURITY

  1. We must insure our national security.
  2. The college failed to provide adequate security on campus after dark.
  3. There was a lapse in security and the inmates escaped.
  4. We have to go through security at the airport.
  5. We called security when we found the door open.
  6. The meeting was held under tight security.
  7. The prisoner was being kept under maximum security.
  8. I like the security of knowing there will be someone there to help me when I need help.
  9. Growing up in a close family gave her a sense of security.

First Known Use of SECURITY

15th century

Rhymes with SECURITY

SECURITY Defined for Kids


noun se·cu·ri·ty \si-ˈkyr-ə-tē\
plural se·cu·ri·ties

Definition of SECURITY for Kids

:  the state of being safe :  safety <national security>
:  freedom from worry or anxiety <financial security>
:  something given as a pledge of payment <He gave security for a loan.>
:  something (as a stock certificate) that is evidence of debt or ownership
Medical Dictionary


noun se·cu·ri·ty \si-ˈkyr-ət-ē\
plural se·cu·ri·ties

Medical Definition of SECURITY

:  freedom from fear or anxiety <need for security dates back into infancy—K. C. Garrison>
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