Influential

a.

1.

Exerting or possessing influence or power; potent; efficacious; effective; strong; having authority or ascendency; as, an influential man, station, argument, etc. A very influential Gascon prefix. - Earle.

Adj.

1.

influential - having or exercising influence or power; "an influential newspaper"; "influential leadership for peace" Antonyms: uninfluential - not influential

absolute, ascendant, authoritarian, authoritative, authorized, autocratic, charismatic, charming, clothed with authority, commanding, competent, consequential, considerable, controlling, dominant, duly constituted, effective, effectual, efficacious, eminent, empowered, enchanting, estimable, ex officio, forceful, governing, great, guiding, hegemonic, hegemonistic, imperative, instrumental, leading, magnetic, mighty, monocratic, official, personable, persuasive, potent, powerful, predominant, preeminent, prestigious, puissant, ranking, reputable, ruling, senior, strong, suasive, substantial, superior, supreme, telling, totalitarian, winning