Dictionary.net

Practice. Signifies to justify or maintain an act formerly done. For example, when replevin is brought for a thing distrained, and the distrainer justifies the taking, he is said to avow. Termes de la Ley. This word also signifies to bring forth anything. Formerly when a stolen thing was found in the possession of any one" he was bound advocare, i. e. to produce the seller from whom he alleged he had bought it, to justify the sale, and so on till they found the thief. Afterwards the word was taken to mean anything which a man admitted to be his own or done by him, and in this sense it is mentioned in Fleta, lib. 1, c. 5, par 4. Cunn., Dict. h. t.