noun
security
sih-KYOOR-rih-tee
noun
1
The state of being safe from danger, harm, or threat.
"Airport security has tightened significantly in recent years."
"Owning a home gave her a sense of financial security."
2
The staff or systems responsible for protecting a place or people.
"Security escorted the man out of the building."
3
A tradeable financial asset such as a stock or bond.
"The fund invests mainly in government securities."
4
Property pledged as a guarantee that a loan will be repaid.
"The bank asked him to put up his car as security for the loan."
How to Use Security
Learner’s notesIn plain EnglishSafety and protection — or, in finance, a tradeable asset like a share or bond.
Common pairings
national security
job security
security guard
buy securities
Word Forms
securities plural
Study it as flashcards or scroll it in Flow — saved to your collection.
Test yourself on “security”
A quick quiz — meaning, synonyms & usage
→
Fill the Gap
Can you complete this real example?
Airport _____ has tightened significantly in recent years.
Etymology
From Latin securitas, "freedom from care," built from the same root as secure — se- ("without") + cura ("care").