- a boys' school in Surrey, England, moved from its orig. location in London that was on the site of a Carthusian monastery
- Archaic a Carthusian monastery
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Origin: Middle English charterhous, by folk etymology from Anglo-Norman chartrouse, from Old French (maison) chartreuse, Carthusian (house), feminine of chartreus, Carthusian, variant of charteus, from Medieval Latin cartusius.