adjective. Producing or sufficient to produce a desired effect. synonym: effective.

Producing an effect, or the effect desired or intended; also, loosely, having adequate power or force to produce the effect: as, the means employed were effectual.

True; veracious.

adjective. Producing, or having adequate power or force to produce, an intended effect; adequate; efficient; operative; decisive.

adjective. a doctrine concerning the work of the Holy Spirit in producing conviction of sin and acceptance of salvation by Christ, -- one of the five points of Calvinism. See Calvinism.

adjective. Producing the intended result; entirely adequate.

adjective. producing or capable of producing an intended result or having a striking effect

adjective. having legal efficacy or force

"Based on interviews and case studies with successful U.S. entrepreneurs and executives at large corporations, Sarasvathy found that master entrepreneurs rely on what she calls effectual reasoning."

ineffectual  

effectual adjudication  

hard-hitting  impelling  impressive  rough-and-ready  telling  

effect  effective  effectivity  efficacious  efficacity  

adequate  conclusive  decisive  drastic  economical  

able  achieving  active  actual  adequate