glasshouse

noun, plural glass·hous·es [glas-hou-ziz, glahs-] /ˈglæsˌhaʊ zɪz, ˈglɑs-/.

1. a glassworks.
2. Chiefly British. a green-house.
3. British Informal. a military prison.

noun

1. British a glass building, esp a greenhouse, used for growing plants in protected or controlled conditions
2. obsolete, informal, mainly British a military detention centre
3. US another word for glassworks