Définitions
1.VerbTo state under oath, to plead.
2.VerbTo cite or quote an author or his work for or against.
3.VerbTo adduce (something) as a reason, excuse, support etc.
4.VerbTo make a claim as justification or proof; to make an assertion without proof."The agency alleged that my credit history had problems."
5.Verb(Can we verify this sense?) To lighten, diminish.