verb (used with object), en·sured, en·sur·ing. to secure or guarantee: This letter will ensure you a hearing. to make sure or certain: measures to ensure the success of an undertaking.

What is the full meaning of Ensure?

: to make sure, certain, or safe : guarantee.

Does ensure mean make sure?

There's no difference in meaning between make sure and ensure, it's just that ensure is more formal. When speaking, we typically use make sure. If writing a more formal article or business text, we would use ensure.