Threshold - Definition
threshold
n 1: the starting point for a new state or experience; "on the
threshold of manhood"
2: the smallest detectable sensation [syn: threshold, limen]
3: the entrance (the space in a wall) through which you enter or
leave a room or building; the space that a door can close;
"he stuck his head in the doorway" [syn: doorway, door,
room access, threshold]
4: the sill of a door; a horizontal piece of wood or stone that
forms the bottom of a doorway and offers support when passing
through a doorway [syn: doorsill, doorstep, threshold]
5: a region marking a boundary [syn: brink, threshold,
verge]