leaky /ˈliːki/ adjective2 •Having leaks; not fully sealed.The leaky bucket dripped only one drop at a time, but by the time I got back to the house it was half empty.The ceiling was so leaky that someone had to fix it. •Tending to leak secrets or information.The spooks' argument against this is that the secret service would become leaky and demoralised […] — 1986 formsleakier · leakiest