Lewis Short
commūnītĭo (noun F) : 1. communio.
* Abstr., the making or preparing of a way; trop. = Gr. ὁδοποίησις: anne autem principium aut rei totius, quae agetur, significationem habere debebit, aut aditum ad causam et communitionem, etc.,Cic. de Or. 2, 79, 320.
* Concr., a fortification, Vitr. 10, 13, 1.
Charlton T. Lewis, Charles Short, A Latin Dictionary