plug

A plug is an object that fills a gap. Examples of a plug are, an electrical plug which plugs into the wall or electrical socket, a sink plug (or stopper) which stops the water from draining out of the sink or bath.

If you plug something you close by putting something into it.

Example: We use corks to plug the barrels.

If you plug something in (or into) you put into a socket.

If you plug something in you connect it to electricity.

Example: You have to plug the computer in if for it to work.

If you plug in an idea or way of doing something, you use it as a whole (without changing it).

Example: We just plugged in the results from last year and everything worked.