Webster's English Dictionary

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leak

1. leak \'le-k\ vb [ME leken, fr. ON leka; akin to OE leccan to moisten, 
   OIr ]legaim I melt 1a: to enter or escape through an opening usu. by a 
   fault or mistake {fu mes ~ in} 1b: to let a substance or light in or out 
   through an opening  2: to become known despite efforts at concealment  1: 
   to permit to enter or escape through or as if through a leak  2: to give 
   out (information) surreptitiously 
2. leak n 1a: a crack or hole that usu. by mistake admits or lets escape  
   1b: something that permits the admission or escape of something else usu. w 
   ith prejudicial effect 1c: a loss of electricity due to faulty insulation; 
   also : the poin t or the path at which such loss occurs 2: the act, 
   process, or an instance of leaking