Many disciplines describe themselves as studying 'communication'. However observation of interdisciplinary discussion suggests that 'communication' may be conceptualized in different ways by different disciplines. This paper aims to promote mutual understanding among disciplines, not by proposing a universally valid definition of communication to which all disciplines should subscribe, but by, first, offering a set of questions that can be used to help disciplinary groups communicate their own views on communication to colleagues from other disciplines, and then creating a (preliminary) typology to map out the range of possible positions that can be taken in relation to those questions. Noting that academic disciplines have distinct cultures, the paper presents some concepts of intercultural communication as understood in applied linguistics that may be useful in facilitating interdisciplinary communication about communication.