A relation between an InformationObject and a 'meaning', generalized here as a 'SocialObject'. For example: 'A Beehive is a structure in which bees are kept, typically in the form of a dome or box.' (Oxford dictionary)'; 'the term Beehive expresses the concept Beehive in my apiculture ontology'.
The intuition for 'meaning' is intended to be very broad. A separate, large comment is included for those who want to investigate more on what kind of meaning can be represented in what form.