Phrases starting with the letter: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Previous word: undermentioned
Next word: undermost
Definition of: undermine
(un′dər·mīn′, un′dər·mīn) v.t. ·mined, ·min·ing
1. To excavate beneath; dig a mine or passage under: to undermine a fortress.
2. To weaken by wearing away at the base.
3. To weaken or impair secretly or by degrees: to undermine the influence or the health of someone. See synonyms under WEAKEN.
—un′der·min′er noun
Comment about this word, ask questions, or add new information about this topic: