Meaning:

You use this proverb to say that it is much easier to do something to prevent a problem than to deal with it after it has happened.

This proverb expresses a similar idea to that of A stitch in time saves nine.

Example:

I strongly recommend backing up your data at least once a day. An ounce of prevention is worth a pound of cure.

This vaccine costs $25, but it would cost you at least $1500 if you caught the disease and had to be treated in a hospital. An ounce of prevention is worth a pound of cure.

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