A leak involves the release of something. It can be a behind-someone’s-back leak of sensitive information, a leak from a milk carton, or a leak in the roof that lets rain water drip in.

As a verb, leak means to allow light or fluid to escape, or to enter or escape as though through a hole. Light can leak in through the curtains, water can leak out of an almost-closed faucet, or information can leak to the press. A leak is almost always a bad thing — it indicates that something that should be contained has broken out or escaped.

Definitions of leak
  1. verb
    enter or escape as through a hole or crack or fissure
    “Water leaked out of the can into the backpack”
    “Gas leaked into the basement”
  2. verb
    have an opening that allows light or substances to enter or go out
    “The container leaked gasoline”
    “the roof leaks badly”
    see moresee less
    bilge, take in water
    take in water at the bilge
  3. noun
    an accidental hole that allows something (fluid or light etc.) to enter or escape
    “one of the tires developed a leak
    see moresee less
    type of:
    an opening into or through something
  4. noun
    the discharge of a fluid from some container
    “he had to clean up the leak
    synonyms: escape, leakage, outflow
    see moresee less
    type of:
    discharge, outpouring, run
    the pouring forth of a fluid
  5. noun
    a euphemism for urination
    synonyms: making water, passing water, wetting
    see moresee less
    type of:
    micturition, urination
    the discharge of urine
  6. noun
    soft watery rot in fruits and vegetables caused by fungi
    see moresee less
    type of:
    soft rot
    mushy or slimy decay of plants caused by bacteria or fungi
  7. verb
    be leaked
    “The news leaked out despite his secrecy”
    synonyms: leak out
    see moresee less
    type of:
    break, get around, get out
    be released or become known; of news
  8. verb
    tell anonymously
    “The news were leaked to the paper”
    see moresee less
    type of:
    break, bring out, disclose, discover, divulge, expose, give away, let on, let out, reveal, unwrap
    make known to the public information that was previously known only to a few people or that was meant to be kept a secret
  9. noun
    unauthorized (especially deliberate) disclosure of confidential information
    synonyms: news leak
    see moresee less
    type of:
    disclosure, revealing, revelation
    the act of making something evident
Word Family

Test prep from the experts

Boost your test score with programs developed by’s experts.

  • Proven methods: Learn faster, remember longer with our scientific approach.
  • Personalized plan: We customize your experience to maximize your learning.
  • Strategic studying: Focus on the words that are most crucial for success.


  • Number of words: 500+
  • Duration: 8 weeks or less
  • Time: 1 hour / week


  • Number of words: 500+
  • Duration: 10 weeks or less
  • Time: 1 hour / week


  • Number of words: 700+
  • Duration: 10 weeks
  • Time: 1 hour / week