neurone UK /ˈnjʊəɹɒn/US /ˈn(j)ʊɹɑn/ noun3 •A cell of the nervous system, which conducts nerve impulses; consisting of an axon and several dendrites. Neurons are connected by synapses. •A mathematical function serving as an essential unit of an artificial neural network. •A nervure of an insect's wing. formsneurones