noun

• (computing) The gradual loss of a system resource caused by failure to deallocate previously reserved portions.
  "resource leak"
• (mildly vulgar, slang, especially with the verb "take") An act of urination.
  "I have to take a leak."

verb

• (transitive) To allow fluid or gas to pass through an opening that should be sealed.
  "The wells are believed to have been leaking oil for decades, long after the operating company ceased to exist."
• (intransitive) (of a fluid or gas) To pass through an opening that should be sealed.
  "The faucet has been leaking since last month."
• (ambitransitive) To disclose secret information surreptitiously or anonymously.
  "Someone must have leaked it to our competitors that the new product will be out soon."
• (intransitive, figurative, by extension) To pass through when it would normally or preferably be blocked.
  "A target that is not detected would not be intercepted and thus would leak through the single defensive layer."

adj

• (obsolete) Leaky.
  "Yet is the bottle leake, and bag so torne, / That all which I put in fals out anon […]."