noun

• (uncountable) A strong, unpleasant emotion or feeling caused by actual or perceived danger or threat.
  "He was struck by fear on seeing the snake."
• (countable) A phobia, a sense of fear induced by something or someone.
  "Not everybody has the same fears. I have a fear of ants."
• (uncountable) Terrified veneration or reverence, particularly towards God, gods, or sovereigns.
  "The feare of the Lord is the beginning of wisedome."
• (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.
  "Her feeling of humiliation had intensified as the day had gone on and her hangover had worsened. She now also had 'the fear' to contend with, […]"

verb

• (transitive) To be afraid of (something or someone); to consider or expect (something or someone) with alarm.
  "I fear the worst will happen."
• (intransitive) To feel fear.
  "Never fear; help is always near."
• (intransitive) To worry about, to feel concern for, to be afraid for [with for].
  "She fears for her son’s safety."
• (transitive) To venerate; to feel awe towards.
  "People who fear God can be found in Christian churches."

adj

• (dialectal) Able; capable; stout; strong; sound.
  "hale and fear"