(uncountable) A strong, unpleasant emotion or feeling caused by actual or perceived danger or threat.

(countable) A phobia, a sense of fear induced by something or someone.

(uncountable) Terrified veneration or reverence, particularly towards God, gods, or sovereigns.

(UK, with definite article, "the fear") A feeling of dread and anxiety when waking after drinking a lot of alcohol, wondering what one did while drunk.

(transitive) To be afraid of (something or someone); to consider or expect (something or someone) with alarm.

(intransitive) To feel fear.

(intransitive, used with for) To worry about, to feel concern for, to be afraid for.

(transitive) To venerate; to feel awe towards.

(transitive) To regret.