verb
-sures; -sured; -suring
[+ obj] to buy insurance for (something, such as property or health)
to provide insurance for (something, such as property or health)
US :to make (something) sure, certain, or safe :ensure
insure against
[phrasal verb]
insure against (something) :to make (something bad) less likely to happen usually by planning and preparing
insure (someone) against (something) :to protect (someone) from (something bad)