en ‧ sure S2 W1 AC /ɪnˈʃʊə $ -ˈʃʊr/ BrE AmE especially British English ( also insure American English ) verb [transitive]
to make certain that something will happen properly SYN make sure :
facilities to ensure the safety of cyclists
ensure (that)
The hospital tries to ensure that people are seen quickly.
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In everyday English, people usually say make sure rather than ensure :
▪
Please make sure all the windows are closed.
Make sure is followed by a clause (with or without that ), never a direct object:
▪ regulations to ensure their safety ➔ regulations to make sure (that) they are safe