'Excitable' definitions:

Definition of 'excitable'

From: WordNet
adjective
Easily excited [ant: unexcitable]
adjective
Capable of responding to stimuli [syn: excitable, irritable]

Definition of 'Excitable'

From: GCIDE
  • Excitable \Ex*cit"a*ble\, a. [L. excitabilis inciting: cf. F. excitable.] Capable of being excited, or roused into action; susceptible of excitement; easily stirred up, or stimulated. [1913 Webster]