exchange fire; get power connected
Meanings
2 senses · 6 examplesverb
to open fire; to exchange gunfire; to engage in battle
informalOriginally used for military conflicts. The colloquial suffix '儿' (～儿) is optional.
The scout reported that the forward troops have already engaged the enemy in firefight.
As soon as the two sides exchanged fire, the battle officially commenced.
Show 1 more exampleShow fewer examples
Don't act rashly; wait until they start firing before we move.
verb
to get power connected; to have electricity turned on
informalRefers specifically to the connection of electrical circuits to enable power flow. Often used in the context of household or building wiring.
The wiring in the new house is all laid out, we're just waiting for the power company to come and connect the electricity.
The electrician said he'll come this afternoon to get these lights powered up.
Show 1 more exampleShow fewer examples
The air conditioner is installed, but the power isn't connected yet, so it can't be used.