an [irreg.] verbal noun of اِطْمَأَنَّ, (S, K,) or a subst. therefrom; as such signifying [A depression in the ground; as, for instance, in the S and K voce رَزْنٌ: (comp. مُطْمَأَنٌّ:)
2.
and also] Stillness, a state of rest or ease, quietness, calmness, tranquillity, or freedom from disquietude. (Mgh, Msb.)