threshold

/ˈθrɛʃhoʊld/
noun
  1. The strip of wood, stone, or metal at the bottom of a doorway that you step over when entering a room or building.
    • She paused on the threshold before entering the house.
    • The old wooden threshold was worn down from years of use.
    • He tripped on the threshold and nearly fell into the room.
  2. The point at which something begins or changes; a limit or level.
    • The patient's pain threshold is very high.
    • The company set a threshold for minimum sales before bonuses are paid.
    • We are on the threshold of a new era in technology.
  3. The level at which a stimulus or signal is strong enough to be detected or to produce a response.
    • The machine measures the threshold at which the light becomes visible.
    • The sound was below the threshold of human hearing.
    • Each person has a different threshold for feeling cold.
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