(noun)
a device that can be connected to a telephone and used to secretly overhear conversations;
e.g. I suspected that they had put a tap on my phone, so I didn't reveal private information.
(noun)
a light and brief strike laid on something or someone, or the sound such a strike might make;
e.g. They heard a tap on the door, which meant their guests had arrived.
(noun)
a style of dancing in which dancers have metal plates on the toes and heels of their shoes in order to make sounds when they step;
e.g. She is trained in tap and modern dance.
(verb)
to lightly strike something or someone, or to lightly strike something against a surface, often making a sound in the process;
e.g. She was using her pen to tap out a rhythm on the desk.
(verb)
to fit a spout into a closed container in order to draw or allow liquid out of it;
e.g. He showed me how to tap a barrel without contaminating the liquid inside.
(verb)
to make use of a resource as a supply for something, often in a way that exploits;
e.g. They plan to tap their reserves for additional funding.
(verb)
to connect a specialized device to a telephone in order to secretly listen in on conversations;
e.g. The enemies tried to tap our phones to find out our plans.