Mudrā means seal or sign. In ritual and iconography it is a gesture of the hands expressing a meaning, such as fearlessness or teaching. In haṭha yoga it is a technique that directs and seals the vital energy. In some Buddhist tantras, mahāmudrā, the great seal, names the nature of mind itself.
Mudrā
A seal: a symbolic gesture of the hands, or a bodily practice that seals energy in yoga.
Also: Mudra