1. (n.) A coming or happening; as, the occurrence of a railway collision.

2. (n.) Any incident or event; esp., one which happens without being designed or expected; as, an unusual occurrence, or the ordinary occurrences of life.

accessibility actual presence adventure affair apparition appearance appearing arising availability avatar being being here being there chance circumstance coming coming into being coming-forth condition conjuncture contingency development disclosure emergence emergency ens entity epiphany episode esse essence event eventuality exigency existence experience exposure fact forthcoming frequency go hap happening happenstance hereness immanence immediacy incarnation incidence incident indwellingness inherence instance issuance juncture life likelihood manifestation materiality materialization materializing matter matter of fact occasion opening particular pass phenomenon physical presence presence presentation rate reality realization revelation rise rising showing showing forth situation spiritual presence state subsistence substantiality theophany thereness thing turn of events ubiety unfolding unfoldment whereness