A wide estuary formed as a lagoon at the mouth of one or more rivers, where flow is constrained by a bar of sediments (created by either the current of a sea or a sediment-saturated river), especially in the Black Sea region.
From Russian лима́н (limán) or Ukrainian лима́н (lymán), from Turkic, compare Turkish liman (“port, harbor”). Ultimately from Ancient Greek λιμήν (limḗn, “harbor”).