full speed; top speed
Used for moving as fast as possible, often with verbs like 出す, 走る, or で.
彼は全速力で走った。
He ran at full speed.
車は全速力を出して高速道路を走っていた。
The car was going at top speed on the highway.
The dog came running at full speed.
The car gave full speed and chased after it.
The thief fled at full speed.