Phrases & IdiomsIdiom guide

Curiosity Killed the Cat

“Curiosity killed the cat” is a warning that asking too many questions or prying into something can lead to trouble. It is normally used as a caution about excessive or intrusive curiosity, not as a literal statement.

Quick answer

“Curiosity killed the cat” warns that excessive or intrusive curiosity can lead to trouble.

Key details

Canonical Formcuriosity killed the cat
Core Meaninga warning not to ask too many questions or pry too far

Further guidance

History Boundary

The guide publishes current dictionary-supported meaning without asserting an exact inventor, coinage date, or absolute first use.

Meaning

a warning against excessive or intrusive curiosity

Sources and evidence

Sources are shown with the role they play in this guide. Historical or style-sensitive claims are kept within the evidence boundary described above.

  1. Curiosity killed the cat — Cambridge Dictionary (opens in a new tab)Cambridge Dictionary · Current warning meaning of the saying

Related guides

Phrases & Idioms

Dead Cat Bounce

A “dead cat bounce” is a short-lived market rebound after a substantial decline. It is a specialized finance expression; do not use it as a neutral label for any small improvement unless the temporary-rebound sense is intended.

Phrases & Idioms

A Blessing in Disguise

“A blessing in disguise” describes something that initially seems bad or unlucky but later produces a good result. Specialist history places the printed phrase in the mid-eighteenth century, while earlier texts may express similar ideas without proving the same idiom.

Phrases & Idioms

A Snowball’s Chance in Hell

The informal idiom “not have a snowball’s chance in hell” describes a situation with essentially no chance of success. This guide limits the page to the current form, register, and meaning supported by Cambridge and does not add an unsupported origin story.

Phrases & Idioms

Actionable Indication of Interest

Actionable Indication of Interest is a current federal securities-regulation defined term. This guide preserves the rule-specific definition and boundaries instead of replacing it with informal market shorthand.

Phrases & Idioms

Administrative Data

Administrative Data is a current Regulation NMS defined term for specified administrative, control, and technical messages in the market-data plan framework.

Phrases & Idioms

Affiliate of a Subscriber

Affiliate of a Subscriber is a current Regulation ATS defined term. This guide preserves the rule-specific meaning and boundary instead of replacing it with informal market shorthand.

Phrases & Idioms

Against All Odds

“Against all odds” emphasizes success despite obstacles or an unfavorable likelihood. Cambridge also records “against (all) the odds,” so the guide treats those forms as part of the same current idiom rather than inventing separate origin claims.

Phrases & Idioms

Aggregate Quotation Size

Under current U.S. Regulation NMS definitions, aggregate quotation size is the sum of the quotation sizes of all responsible brokers or dealers communicating bids or offers in an NMS security at the same price. Treat this as a U.S. securities-regulation definition; it should not be generalized to unrelated uses of aggregate size or quotation outside Regulation NMS.

Explore the topic