أُجُمٌ

A fortress; (Mgh, Msb, K;) like أُطُمٌ: (Mgh:) plural اجَامٌ. (Mgh, Msb, K.) الأُجُمُ [is the name of] A fortress (S, K) in El-Medeeneh, (K,) built of stones by the people of that city: and Yaakoob says that أُجُمٌ signifies any square, roofed, house. (S, Sgh.) Imra-el-Keys says, [describing a vehement rain,]

وَتَيْمَاءَ لَمْ يَتْرُكْ بِهَا جِذْعَ نَخْلَةٍ

وَلَا أُجُمَّا إِلَّا مَشِيدًا بِجَنْدَلِ

[And Teymà, (a town so called,) it left not therein a trunk of a palm-tree, nor a square, roofed, house, unless raised high with stones: but in the Calc. ed. of the Mo' allakát, (p. 54,) for أُجُمَّا, we find أُطُمَّا, which has the same meaning]. (S, Sgh.) See also أَجْمٌ. (TA.) Accord. to As, it is also pronounced ↓ أُجْمٌ. (S.)