Pronunciation: (thresh'ōld, thresh'hōld),[key] —n. 1. the sill of a doorway.
2. the entrance to a house or building.
3. any place or point of entering or beginning: the threshold of a new career. 4. Also called limen.Psychol.,Physiol. the point at which a stimulus is of sufficient intensity to begin to produce an effect: the threshold of consciousness; a low threshold of pain.