Other forms: roundhouses
A roundhouse is a circular shed where locomotives were turned and stored. The old roundhouse, inside the roundhouse, a roundhouse turntable.
The turntable in the middle let an engine be run onto it, spun and sent down any of the radiating tracks, which was the only practical way to store engines that could not reverse easily. The Roundhouse in London is one, now a concert venue.
1nounroundhouseA circular shed where locomotives were turned and stored.
“In the age of steam, most big railway towns had a roundhouse where engines were cleaned and repaired.”
roundhouse is a building.
Round plus house. The word once also meant a lock-up for prisoners.
Dutch
rondhuis — guardhouse
English, today
roundhouse
From round + house, a Dutch rondhuis (“guardhouse”). Mid-15th c.
Etymology from Wiktionary, CC BY-SA