Guaranteed issue in life insurance means that you will not be turned down for life insurance for any reason, regardless of any health condition.  

Most life insurance policies go through underwriting, which is where the life insurance company decides the degree of risk involved with insuring you for life insurance.

For example, are you healthy and expected to live a long life or do you have health issues that could shorten your life expectancy?

With a guaranteed issue life insurance policy, typically there is what they call a "graded benefit" period in that the policy will not pay the full face amount of life insurance coverage for a period of time, typically 2 years but sometimes 3 years.

So, if you pass away during the first two years you are insured, your beneficiary would not get the full death benefit. However, if you pass away after being insured for at least two years, the full death benefit would be paid out to the person or persons you choose as beneficiary to your life insurance policy.

Here's how to get guaranteed issue life insurance coverage.