The definition of aver is to declare or affirm something to be true with a strong sense of confidence.(verb)
An example of aver is to firmly and assertively state that you are not guilty.
See aver in Webster's New World College Dictionary
See aver in American Heritage Dictionary 4
transitive verb a·verred, a·ver·ring, a·vers
Origin: Middle English averren
Origin: , from Old French averer
Origin: , from Vulgar Latin *advērāre
Origin: : Latin ad-, ad-
Origin: + Latin vērus, true; see wērə-o- in Indo-European roots.
Learn more about aver