Definition of someone's word is law
- He'll listen to suggestions, but in the end, his word is law.
: some person : somebody
: a speech sound or series of speech sounds that symbolizes and communicates a meaning usually without being divisible into smaller units capable of independent use
: the entire set of linguistic forms produced by combining a single base with various inflectional elements without change in the part of speech elements
: a written or printed character or combination of characters representing a spoken word
: to express in words : phrase
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