To permit the escape, entry, or passage of something through a breach or flaw: rusted pipes that were beginning to leak; a boat leaking at the seams.
To escape or pass through a breach or flaw: helium leaking slowly from the balloon.
Informal To become publicly known through a breach of secrecy: The news has leaked.
To permit (a substance) to escape or pass through a breach or flaw: a damaged reactor leaking radioactivity into the atmosphere.
Informal To disclose without authorization or official sanction: leaked classified information to a reporter.
A crack or flaw that permits something to escape from or enter a container or conduit: fixed the leak in the roof.
The act or instance of leaking.
An amount leaked: equipment used in cleaning up oil leaks.
Informal An unauthorized or a deliberate disclosure of confidential information: "Sometimes we can't respond to stories based on leaks” ( Ronald Reagan).
Loss of electric current as a result of faulty insulation.