Sacramentum is a Latin word meaning "oath" and later "sacrament," and may refer to:
Sacramentum (oath), a Roman oath Sacramentum caritatis, a post-synodal apostolic exhortation published in 2007 Sacramentum Poenitentiae, an apostolic constitution published by Pope Benedict XIV in 1741
Other Sacramentum (band), a black metal band
See also Sacrament (disambiguation) Sacramento (disambiguation)