verb
verb: leak; 3rd person present: leaks; past tense: leaked; past participle: leaked; gerund or present participle: leaking
1. 
(of a container or covering) accidentally lose or admit contents, especially liquid or gas, through a hole or crack.
"the roof leaked"
synonyms:
seep (out), escape, ooze (out), secrete, bleed, emanate, issue, drip, dribble, drain; More
discharge, exude 
"oil leaking from the tanker"
(of liquid, gas, etc.) pass in or out through a hole or crack by accident.
"water kept leaking in"
2. 
(of secret information) become known.
"the news leaked out"
intentionally disclose (secret information).
"who had a motive to leak the story?"
synonyms:
disclose, divulge, reveal, make public, tell, impart, pass on, relate, communicate, expose, broadcast, publish, release, let slip, bring into the open; More
informalblab; 
let the cat out of the bag, spill the beans 
"civil servants leaked information to the press"
noun
noun: leak; plural noun: leaks
1. 
a hole in a container or covering through which contents, especially liquid or gas, may accidentally pass.
"I checked all of the pipes for leaks"
synonyms:
hole, opening, aperture, puncture, perforation, gash, slit, nick, rent, break, crack, fissure, rupture 
"check that there are no leaks in the pipe"
the action of leaking accidentally.
"the leak of fluid may occur"
synonyms:
discharge, leakage, seepage, drip, escape 
"a gas leak"
2. 
an intentional disclosure of secret information.
"one of the employees was responsible for the leak"
synonyms:
disclosure, revelation, exposé, leakage, tip-off, hot tip 
"leaks to the media"