CAUSAL, adjective [See Cause.] Relating to a cause or causes; implying or containing a cause or causes; expressing a cause. CAUSAL propositions are where two propositions are joined by causal words, as that or because. CAUSAL, noun In grammar, a word that expresses a cause, or introduces the reason.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI