old age security
noun/ˌəʊld eɪdʒ sɪˈkjʊərəti/
/ˌəʊld eɪdʒ sɪˈkjʊrəti/
[uncountable] (abbreviation OAS)
(Canadian English)- a regular income paid by the government to people above the age of 65
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old age security