Clavis

Clavis may refer to:
 * Glossary, a key or alphabetical list of terms in a particular domain of knowledge with the definitions for those terms
 * Handcuffs, restraint devices designed to secure an individual's wrists in proximity to each other after being arrested or taken into custody
 * Clavis (publisher), Flemish publishing house of children's literature
 * Clavis aurea, a Latin phrase meaning "golden key"
 * Clavis Salomonis (English: Key of Solomon), a pseudepigraphical grimoire attributed to King Solomon
 * O Clavis David, a Magnificat antiphon for December 20
 * Clavis Patrum Graecorum, a series of volumes which aims to contain a list of all the Fathers of the Church who wrote in Greek from the 1st to the 8th centuries