We define ensure as “to make sure, certain, or safe” and one sense of insure, “to make certain especially by taking necessary measures and precautions,” is quite similar.

INSURE definition: to guarantee against loss or harm. See examples of insure used in a sentence.

to protect yourself against risk by buying insurance from a company that will provide an agreed amount of money if a particular event happens, for example if you are killed or injured or if your possessions …

Definition of insure verb in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

In both British and American English, if you insure your property, you pay money to a company so that if the property is lost, stolen, or damaged, the company will pay you a sum of money.

If you insure yourself or your property, you pay money to an insurance company so that if you become ill or if your property is stolen, the company will pay you a sum of money.

Collins Concise English Dictionary © HarperCollins Publishers:: insure /ɪnˈʃʊə; -ˈʃɔː/ vb (often followed by against) to guarantee or protect (against risk, loss, etc)

From Longman Business Dictionary in‧sure /ɪnˈʃʊə-ˈʃʊr/ verb [intransitive, transitive] 1 to buy insurance to protect yourself, your family, your business etc against something bad happening, for example …

Dec 14, 2025 · insure (third-person singular simple present insures, present participle insuring, simple past and past participle insured) (transitive) To provide for compensation if some specified risk occurs.

To insure is to pay an insurance company regularly so that if something goes wrong, they’ll help cover the costs. Although it’s certainly reassuring to have insurance, the word insure always has a financial …