Allegation [fr. alleguer, Fr.; allegare, Lat., to allege], an asserted fact; the adduction of reasons or witnesses in support of an argument.
Allegation, means something alleged, an assertion; an assertion without proof; Webster Law Dictionary, p. 38.
In the Indian Parliament, an allegation of a defamatory or incriminatory nature against any person or Minister can only be made after giving adequate advance notice to the Speaker and also to the Minister concerned so as to enable the Minister to investigate the matter for the purpose of a reply. The Speaker may prohibit any member from making any such allegation, if it is in his opinion derogatory of the House or no public interest is served. Identical provision exists in Rajya Sabha. Rules of Procedure and Conduct of (Rajya Sabha) Business in the Council of States, 5th Edn. 2000, Rule 353, proviso to the Rule 353 Rule 238A of Rajya Sabha.