High land or ground, the middle of which is low, or depressed; ( K ;) as also ↓ مَحْجِرٌ: ( TA :) and ↓ مَحَاجِرُ [ pl. of the latter] low places in the ground, retaining water. ( A .) A fertile piece of land, abounding with herbage, low, or depressed, and having elevated borders, upon which the water is retained. ( AHn .)Web