deciding /dɪˈsaɪ.dɪŋ/adjective 1noun 1forms 3 adjective1 •Resulting, having resulted, or having the potential to result in a decision or conclusion.The cost turned out to be the deciding factor in our final choice. noun1 •The act of making a decision.She saw to my meals; but the what and the when and the how of our eating was always controlled by her own decidings. — 2005 formsdecidings · more deciding · most deciding