THRESHOLDS
- THRESHOLD [n]
- THRESHOLD, the sill of a house door; the place or point of entering [n]
- A strip of wood, metal, or stone forming the bottom of a doorway and crossed in entering a house or room
- A point of entry or beginning
- The beginning of an airport runway on which an aircraft is attempting to land
- The magnitude or intensity that must be exceeded for a certain reaction, phenomenon, result, or condition to occur or be manifested
- The maximum level of radiation or a concentration of a substance considered to be acceptable or safe
- A limit below which a stimulus causes no reaction
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