security
n. uncountablen. the state of being safe from danger or worry. It can also mean the people or systems that protect a building or place.
n. the state of being free from danger or threat; safety. Also refers to the measures taken to ensure the protection of a person, building, or organization.
The airport has very tight security.
The building manager hired extra security to monitor the entrance during the busy holiday weekend.
National security often involves a delicate balance between protecting the public from external threats and maintaining the individual privacy of citizens.
From secure + -ity, from Middle English securite, from Middle French securité (modern sécurité), from Latin sēcūritās, from Latin sēcūrus (“safe, secure”), from sē- (“without”) + cūra (“care”); see cure. Similar to Latin sine cūrā (“without care, carefree”), which led to English sinecure. Doublet of surety.
Uncountable when referring to the general state of safety or protection; often used as a modifier before other nouns like 'guard' or 'camera'.