(automotive) A system for reducing the driver's effort to steer, by using a power source to assist in turning the wheels.

(obsolete, nautical) A vessel, often painted red and carrying a red flag, that carried gunpowder to a man of war

Using steam power.

plural of power user

plural of power plant

(algebra) An algebra such that every subalgebra generated by one element is associative.

plural of power tool

Any tool powered by an electric motor. / (slang, derogatory) A very obnoxious person.

(Britain, slang) A tablet of the drug ecstasy.

(statistics) The probability that a statistical test will reject a false null hypothesis, that is, that it will not make a type II error, producing a false negative.