From Longman Dictionary of Contemporary Englishinsurein‧sure /ɪnˈʃʊə $ -ˈʃʊr/ ●●○ verb 1 [intransitive, transitive]BFI to buy insurance so that you will receive money if something bad happens to you, your family, your possessions etc Have you insured the contents of your home?insure (something/somebody) against loss/damage/theft/sickness etc It is wise to insure your property against storm damage.insure something for £1,000/$2,000 etc You should insure the painting for at least £100,000.2 [transitive]BFI to provide insurance for something or someone Many companies won’t insure young drivers.3 x-ref[transitive] an American spelling of ensure → insure (yourself) against something→ See Verb table
Examples from the Corpus
insure• We insured all our valuables before the move.• No one will insure him because of his heart condition.insure (something/somebody) against loss/damage/theft/sickness etc• However, while your policy is suspended we will still insure your car against loss or damage by fire or theft.• Make sure you have arranged mortgage Protection Cover and, if possible, insure yourself against sickness, redundancy or accident.From Longman Business Dictionaryinsurein‧sure /ɪnˈʃʊə-ˈʃʊr/ verb [intransitive, transitive]INSURANCE1to buy insurance to protect yourself, your family, your business etc against something bad happening, for example accidents, damage to property, or injury caused to othersMany companies insure executives’ lives with the companies as beneficiaries.insure (somebody/something) against somethingIt is advisable to insure all oriental carpets against theft and damage.insure something for £1,000/$2,000 etcAirlines insure their aircraft for their replacement value.2to provide insurance for something or someoneinsure (somebody/something) against somethingThe company insured against earthquakes and accidents at sea.→ See Verb tableOrigin insure (1400-1500) Probably from ensure 