pathway-n; 3 Senses

Sense Number 1: a trodden foot route, used for pedestrian travel

Commentary: PATHWAY[+structure][+physical][+route][+pedestrian][+trodden]
NOTE: refers to a usable, demarcated foot route

Examples:
We followed a pathway through the woods to an old cabin.
It was a hidden underground pathway used by royalty for escape.

Mappings:
WordNet 3.0 Sense Numbers: 1

Sense Number 2: a chain of nerve cells that can transmit electrical impulses

Commentary: PATHWAY[+structure][+physical][+anatomical][+chain][+cell][+nerve]
NOTE: refers to component neural structures of the nervous system anatomy.

Examples:
The accident severed the neural pathway from the lower spine to the brain.
The brain contains very large and complex pathways of neurons.

Mappings:
WordNet 3.0 Sense Numbers: 2

Sense Number 3: a chain of enzyme_induced chemical reactions

Commentary: PATHWAY[+event][+sequence][+reaction][+chemical][+enzyme_induced]
NOTE: refers to a series of events

Examples:
These metabolic pathways are not yet well understood by biochemists.
He is studying the metabolic pathways involved in converting starches into sugars.

Mappings:
WordNet 0.0 Sense Numbers: 1b