Knot or knob is a term used to describe a type of fastening device. A NODE is a four-letter word that can be used to describe this type of fastening device. It is a type of knot or knob that is used to secure two pieces of material together. It is often used in rope work, such as tying knots, and in carpentry, such as securing door knobs. NODE is also used to describe a point at which two or more lines intersect.