Definition

Noun Phrase 1. Reliable or credible source of information: The phrase "good authority" refers to information or testimony provided by a person or source that is considered knowledgeable, trustworthy, or credible on a particular matter. It implies that the information comes from someone in a position to know the facts.

Usage

The phrase is almost exclusively used in the construction "to have it on good authority" or "according to good authority". It is used to vouch for the reliability of information one is sharing, without necessarily revealing the source.

Examples

• "I have it on good authority that the manager is resigning next month." (This means the speaker believes the information about the resignation is true because it came from a reliable source.)
• "According to good authority, the company is about to be sold." (This attributes the claim to a credible but unnamed source.)
• "She spoke with good authority on the subject of climate policy." (This means she spoke with the confidence and knowledge of an expert.)

Advanced Usage / Nuances

• The phrase often carries an implicit understanding that the specific source will not or cannot be named, but that the speaker trusts it.
• It is used to add weight to a statement, especially when the information is not yet public knowledge or is speculative.
• "On the best authority" is a stronger variant, suggesting the highest possible credible source.

Variants and Related Words

• Authority (noun): The power or right to give orders, make decisions, or enforce obedience. It can also refer to a person with extensive knowledge in a particular area (e.g., ).
• Authoritative (adjective): Able to be trusted as being accurate or true; commanding and self-confident.
• Authorize (verb): To give official permission for or approval to.

Synonyms

• Reliable source
• Credible source
• Trustworthy information
• Inside information (implies a source within an organization)

Related Idioms and Phrases

• "To have it from the horse's mouth": To get information directly from the person most involved or knowledgeable. This is more specific than "good authority" as it implies a direct, primary source.
• "A little bird told me": A playful or coy way to say one has heard a piece of information without revealing the source. It is less formal and carries less weight than "on good authority."

Noun

1. testimony by someone who should know
   • I have it on good authority