Simple Definition of undermine
: to make (someone or something) weaker or less effective usually in a secret or gradual way
Examples of undermine in a sentence
She tried to undermine my authority by complaining about me to my boss.
The events of the past year have undermined people's confidence in the government.
First Known Use of undermine
Synonym Discussion of undermine
Rhymes with undermine
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UNDERMINE Defined for Kids
Definition of undermine for Students
1 : to dig out or wear away the supporting earth beneath <Erosion undermined the wall.>
2 : to weaken secretly or little by little <Their criticisms undermine my confidence.>
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