Longman Dictionary of Contemporary English homepage

Date: 1300-1400
Language: French
Origin: Medieval Latin influentia, from Latin fluere 'to flow'

influence

1 noun
     
in‧flu‧ence1 S2 W1
1 [uncountable and countable] the power to affect the way someone or something develops, behaves, or thinks without using direct force or orders:
There is no doubt that Bohr's influence was immense.
influence on/over
the unions' influence over local politics
under somebody's influence/under the influence of somebody/something
They had come under the influence of a strange religious sect.
have/exert/exercise influence
The Council had influence over many government decisions.
They were accused of exerting undue influence (=too much influence) on voters.
2 [countable] someone or something that has an influence on other people or things
bad/good/positive etc influence (on somebody)
Gayle's mother said I was a bad influence on her daughter.
For centuries the country remained untouched by outside influences.
3

under the influence (of alcohol/drink/drugs etc)

drunk or feeling the effects of a drug

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