Single hitch or half hitch is a type of knot.

Canonical Name: Single hitch.
Variant Name(s): Half hitch.
[completed picture]
Category: hitch.
Origin: Ancient.
Related knots: two half hitches
Releasing: Non-jamming.
Efficiency: Unknown%.
Caveat: spills, unreliable as a hitch used on its own.
Uses: Used effectively to form many other knots.
Comments:
Structure: This hitch is actually an overhand knot tied around or through an object.
Tying: article/pictures