Definition of "necessarium" in English

noun

1. (architecture) Synonym of reredorter: a monastery's latrine, outhouse, or lavatory, typically located behind the dormitory.

   • A passage at the other end [of the dormitory] leads to the “necessarium” (I), a portion of the monastic buildings always planned with extreme care.

2. (humorous, sometimes capitalized or with the definite article) A lavatory.