עֲצִירָה f. (עָצַר) 1) closing up, obstruction of orifices, v. עִיצּוּר. Gen. R. s. 52 end (ref. to Gen. XX, 18) נאמר ע׳ בפה ע׳ בגרון וכ׳ the root עצר applies to closure of the mouth, of the throat &c.—עֲצִירַת גשמים (v. Deut. XI, 17) closing up the heavens so as to withhold the rain, drought. Sifré Deut. 43; Yalk. ib. 867. —2) locking up, detention. Sifré Num. 151; Yalk. ib. 782 (ref. to עצרת, Num. XXIX, 35) אין ע׳ אלא כניסה the root עצר has the meaning of detention (by ref. to Jer. XXXVI, 5).