threshold

[ˈθrɛʃəʊld,ˈθrɛʃˌhəʊld]
n
Also called: doorsill a sill, esp one made of stone or hardwood, placed at a doorway
any doorway or entrance
the starting point of an experience, event, or venture
on the threshold of manhood
the strength at which a stimulus is just perceivedSee absolute threshold See difference threshold
the threshold of consciousness
a level or point at which something would happen, would cease to happen, or would take effect, become true, etc.(as modifier)
the minimum intensity or value of a signal, etc, that will produce a response or specified effect.(as modifier)
designating or relating to a pay agreement, clause, etc, that raises wages to compensate for increases in the cost of living