Life expectancy for someone who is 65 years old is actually 82.5 or 85.2 years (depends on gender) [1]. You are making a very common mistake by using life expectancy for someone born today -- that's a very different thing.
Is there a less allegedly ambiguous term for the "traditional" definition of average, that is, the sum of many measurements of the same characteristic, divided by the number of elements measured?
Average intelligence, for example, refers to median intelligence (equivalent to an IQ of 100). Mean intelligence, however, is likely the same as median intelligence due to its normal distribution.