Definitions for "Hanmi"
Triangular stance, half open. Most often, Aikido techniques are practiced with uke and nage in pre-determined stances. This is to facilitate learning the techniques and certain principles of positioning with respect to an attack. At higher levels, specific hanmi cease to be of much importance.
Japanese, literally: half-body. Specifically regarding a fighting lead, one's fighting stance, and the relationships between the postures of two opponents (matching/opposite).
half open body; the basic triangular stance of aikido.