One of the mysteries of the English language finally explained.
Financial and material provision for old age; (Canadian and (formerly) US (especially California)) a system of government-funded pensions for those aged over 65 (in the U.S., awarded only on a means-tested basis); the benefit paid under this system.
1920s; earliest use found in untitled. From old age + security.
old age security/ˌəʊld eɪdʒ sɪˈkjʊərɪti//ˌəʊld eɪdʒ sɪˈkjɔːrɪti/
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