Значения термина gradual declension на английском

The country on either side sloped to the river with gradual declension, and was an open forest country.

The gradual declension of property values in Brougham Street had been a danger that each year grew more menacing.

There must have been, however, a gradual declension towards it, although the pain which followed upon this has almost obliterated the recollection of preceding follies.