אםםTop 15000MeaningsConjunction1. iff, if and only if (mathematics, logic)PronunciationIMMExamples1אֲנִי פּוֹתֵחַ אֵת הַמִּטְרִיָּה אםם יוֹרֵד גֶּשֶׁם.I open the umbrella iff it is raining.