Ensure is defined as to make something certain or safe.
(verb)An example of ensure is for a teenager to make sure that his little brother gets home from school safely.
See ensure in Webster's New World College Dictionary
See ensure in American Heritage Dictionary 4
transitive verb en·sured, en·sur·ing, en·sures
Origin:
Origin: Middle English ensuren
Origin: , from Anglo-Norman enseurer
Origin: : Old French en-, causative pref.; see en-1
Origin: + Old French seur, secure
Origin: , variant of sur; see sure
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