threshold

n 1: the starting point of a new state or experience; "on the

threshold of manhood"

2: the smallest detectable sensation [syn: {limen}]

3: 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}]

4: a horizontal piece of wood or stone that forms the bottom of

a doorway and offer support when passing through a doorway

[syn: {doorsill}, {doorstep}]

5: a region marking a boundary [syn: {brink}, {verge}]