security

From Wiktionary
security is on the Academic Word List.

Pronunciation[change]

Noun[change]

Singular
security

Plural
securities

Security is on the Academic Vocabulary List.
  1. Security is safety.
    Traditionally, Japanese workers have had good job security. In fact, they usually had a job for life.
    Since the attack, many Americans have lost their feeling of security.
  2. Security is the people and things that keep you safe.
    After the bombing, the airport increased security.
    If you see a problem, please call security.
  3. (finance) A security is a proof of ownership of stocks and other investments.