(intransitive) To awake. / (transitive) To awaken somebody. / (intransitive) To become more aware of a real-life situation; to concentrate on the matter in hand.

An act or instance of waking up. / An act or instance of being awakened. / Colaptes auratus, northern flicker.

present participle of wake up

simple past tense and past participle of wake up

Third-person singular simple present indicative form of wake up

plural of wake-up

A telephone call to awaken someone at a certain time, especially one requested by the person while staying at a hotel. / (figuratively) An alert, reminder, or call to action caused by a dramatic event.

plural of wake-up call

To die, particularly in one's sleep.

(idiomatic, US, informal) Often in the infinitive or imperative: to face reality and stop deluding oneself.