Meanings of windowless structure in anglès

In back was a low, windowless structure made of corrugated tin.

The windowless structure was bleak, deserted and obviously locked by a strong padlock and hasp.

It was a lonely, retired spot, and the high, dark, windowless structure with its heavy, low-browed door had a menacing aspect.

Across the street from us was a sign indicating that the imposing, windowless structure there was the barracks for the Swiss Guard.

Haven't you seen old, windowless structures that were never completed, or grass-grown railroad enbankments never ironed, or rusting mine machinery never assembled?