What does "power up" mean?

To turn the electrical power on to a device as a precondition to making it operational.

What is a synonym for "power up"?

Common synonyms include: activate, activate system, activation, boost, boot, boot up.

verb

verb ·Uncommon ·Advanced level

Verb

1
To turn the electrical power on to a device as a precondition to making it operational. transitive
"Every morning he powered up his electronic devices, even before making coffee."
2
To become ready for operation as a result of the provision of electrical power. intransitive
"The office systems power up automatically at 7:30am on workdays."

"Every morning he powered up his electronic devices, even before making coffee."