- a lake in NW England, in Cumbria in the Lake District: provides part of Manchester's water supply. Length: 6 km (4 miles)
Examples from the Web for thirlmere
It is only the tap you turn to let Thirlmere come into your basins.Expositions of Holy Scripture
The ascent of Helvellyn is sometimes begun at the foot of Thirlmere.
The turning of Thirlmere into a huge reservoir, and the necessary increase of its depth, hid for ever a number of land-marks.Bygone Cumberland and Westmorland
Thirlmere lies in the Vale of Legberthwaite, and the precipices around it are objects of special admiration.
In the Thirlmere tunnels, driven through very hard Lower Silurian strata, the progress was about 13 yds.