As adjectives the difference between overall and average
is that
overall is all-encompassing, all around while
average is constituting or relating to the average.
As nouns the difference between overall and average
is that
overall is a garment worn over other clothing to protect it; a coverall or boiler suit. A garment, for manual labor or for casual wear, often made of a single piece of fabric, with long legs and a bib upper, supported from the shoulders with straps, and having several large pockets and loops for carrying tools while
average is financial loss due to damage to transported goods; compensation for damage or loss.
As an adverb overall
is generally; with everything considered.
As a verb average is
to compute the arithmetic mean of.