influenceinfluenceinfluences1noun1(no plural) the power to change what somebody believes or does: Television has a strong influence on people.2(pluralinfluences) a person or thing that can change somebody or something: Paul's new girlfriend is a good influence on him.influenceinfluenceinfluencesinfluencedinfluencing2verb (influences, influencing, influenced)to change the way that somebody thinks or the way that something happens: She is easily influenced by her friends.