English Reference
adjective · noun

influential

adj. · n.
US /ˌɪnfɫuˈɛnʃəɫ/ UK /ˌɪnfluːˈɛnʃəl/ in·flu·en·tial

  1. 01 B2 Upper Intermediate

    adj.having the power to change how people think or how things happen.

    adj.having or exerting significant influence; possessing the power to affect the actions, beliefs, or development of others.

    Simple

    Her teacher was very influential and encouraged her to study science at university.

    In context

    The philosopher's early essays remained influential for decades, shaping the political discourse of an entire generation of activists.

    Usage

    often used to describe people, books, or ideas that change a field of study or society.

  2. 02 C1 Advanced Formal

    n.a person who has the power to affect others, especially in politics or business.

    n.an individual who possesses or exerts significant influence within a particular sphere.

    Simple

    The meeting was attended by several political influentials from across the country.

    In context

    The summit brought together a group of global influentials to discuss the economic implications of the new trade treaty.

    Usage

    usually used in the plural to describe groups of powerful people in society.

    Teacher's tip

    In modern contexts, 'influencer' is much more common for social media; 'influential' as a noun is reserved for formal or academic discussions of power.

    power brokerheavyweight

Usage highly influential · influential factor

Matisse is widely considered to be one of the 20th Century's most influential artists and art critics say the value of the stolen works is "incalculable".

BBC News· 14 Aug 2026

The service, Truth API, launched at the beginning of August and gives Wall Street traders first sight of posts from the social media site's most influential accounts.

BBC News· 11 Aug 2026

From Medieval Latin īnfluentiālis, from īnfluentia + -ālis. By surface analysis, influence + -ial.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Origin la-med īnfluentiālis
Level C1 · Advanced
Frequency Common
Updated