יְקוּם, v. קוּם) existence, substance, being. Koh. R. to VI, 3 מהו הי׳ קיומא what is hayy’kum (Gen. VII, 23)? Existence; R. B. says: the inhabited world (v. אִיקוּמֵינֵי); R. El. says, י׳ זה הממון וכ׳ y’kum means property (substance) which makes firm &c.; Gen. R. s. 32. Num. R. s. 18; Pes. 119ᵃ; Snh. 110ᵃ (ref. to Deut. XI, 6).—Pl. יְקוּמִים. Yalk. Gen. 56 נמחו כל הי׳ (Pirké d’R. El. ch. XXIII היקום collective noun) all beings were swept away.