Entry 3 senses · 2 variants Webster, 1913 Saturant · Sat·u·rant · IPA a. n. 01 a. Impregnating to the full; saturating. 1. Impregnating to the full; saturating. 02 n. A substance used to neutralize or saturate the affinity of another substance. 1. A substance used to neutralize or saturate the affinity of another substance.(Chem.) 2. An antacid, as magnesia, used to correct acidity of the stomach.(Med.)