Lit. “Constructing; raising-up.” The term is particularly applied to literary compositions and forms of letter-writing.
Mr. Lane, in his Modern Egyptians, vol. 1, p. 272, mentions the Shaikh of the great Mosque, the Azhar, as the author of a collection of Arabic letters on various subjects, which are intended as models of epistolary style, such a collection being called an Irsha.
Based on Hughes, Dictionary of Islam