Causality \Cau*sal"i*ty\, n.; pl. {Causalities}. 1. The agency of a cause; the action or power of a cause, in producing its effect. [1913 Webster] The causality of the divine mind. --Whewell. [1913 Webster] 2. (Phren.) The faculty of tracing effects to their causes. --G. Combe. [1913 Webster]