neurotransmitter catabolic process
http://purl.obolibrary.org/obo/GO_0042135
The chemical reactions and pathways resulting in the breakdown of any of a group of substances that are released on excitation from the axon terminal of a presynaptic neuron of the central or peripheral nervous system and travel across the synaptic cleft to either excite or inhibit the target cell. [ GOC:jl ]
Synonyms: neurotransmitter catabolism, neurotransmitter breakdown, neurotransmitter degradation