来函 Traditional form: 來函 Pinyin (reading): láihán Definitions: incoming letter letter from afar same as 來信/来信 (láixìn) Characters: 来 - to arrive, to come, to return; in the future, later on 函 - correspondence; a case, a box Traditional characters: 來 - to arrive, to come, to return; in the future, later on 函 - correspondence; a case, a box