Leakage definition is:

• A. A loss of fluid at a rate that forms a pool
• B. A loss of fluid that collects slowly causing surface wetting
• C. A visible sheen
• D. A rapid discharge of fluid

Answer: (A)

Leakage is about a fluid escaping at a rate that allows it to pool on a surface. That pooling indicates a continuing escape rather than just a light damp spot or a film on the surface. The other descriptions describe seepage (slow surface wetting without pooling), a visible sheen (a thin film, not a pooled liquid), or a rapid discharge (a sudden spill rather than a steady leak). So the definition that mentions forming a pool best captures what leakage means.