Definition of influential adjective from the Oxford Advanced Learner's Dictionary



BrE BrE//ˌɪnfluˈenʃl//
; NAmE NAmE//ˌɪnfluˈenʃl//
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having a lot of influence on somebody/something a highly influential book influential in something She is one of the most influential figures in local politics. influential in doing something The committee was influential in formulating government policy on employment. Word Originlate 16th cent. (referring to astral influence): from medieval Latin influentia ‘inflow’, from Latin influere, from in- ‘into’ + fluere ‘to flow’.Extra examples The group was influential in setting up the new schools. This was a highly influential work. His ideas are widely influential among Palestinians. We need to convince certain influential individuals within the community.
See the Oxford Advanced American Dictionary entry: influential