'Vistas' definitions:

Definition of 'Vistas'

From: GCIDE

Vista \Vis"ta\, n.; pl. Vistas. [It., sight, view, fr. vedere, p. p. visto, veduto, to see, fr. L. videre, visum. See View, Vision.] A view; especially, a view through or between intervening objects, as trees; a view or prospect through an avenue, or the like; hence, the trees or other objects that form the avenue. [1913 Webster]
The finished garden to the view Its vistas opens, and its alleys green. --Thomson. [1913 Webster]
In the groves of their academy, at the end of every vista, you see nothing but the gallows. --Burke. [1913 Webster]
The shattered tower which now forms a vista from his window. --Sir W. Scott. [1913 Webster]