insure(redirected from insure against)
Also found in: Dictionary, Thesaurus, Legal, Idioms.
insure(in-shoor′) [ME. insuren, ensuren]
1. To make sure or certain.
2. To make safe or secure.
3. To protect against injury, loss, or expense.
4. To make a contract specifying the terms of such protection.
5. To buy or sell insurance.