English definition of “tap”
/tæp/ verb (present participle tapping, past tense and past participle tapped)
KNOCK [I, T] › to knock or touch something gently: She tapped her fingers nervously on the table. I tapped on the window to try and get her attention.
A SUPPLY [T] › If you tap a supply of something, you use what is available: There are immense natural resources here waiting to be tapped.
TELEPHONE [T] › to use a special piece of equipment to listen to someone's telephone calls: [often passive] I think the phone's been tapped.