Single hitch is a type of knot.

Canonical Name: Single hitch.
Category: hitch.
Origin: Ancient.
Related knots: half hitch
Releasing: Non-jamming.
Efficiency: Unknown%.
Caveat: spills, unreliable as a hitch used on its own.
Uses: Used effectively to form many other knots.
Structure: This hitch is actually an overhand knot tied around or through an object.
Tying: See image.

Knots