"treshold" is probably misspelled. Trying threshold instead Definition of threshold
threshold has definitions from the fields of architecture,psychology
1
[ noun ] the starting point for a new state or experience

Examples

"on the threshold of manhood"

2
[ noun ] the sill of a door; a horizontal piece of wood or stone that forms the bottom of a doorway and offer support when passing through a doorway

Synonyms

doorstep doorsill

3
[ noun ] (architecture) the entrance (the space in a wall) through which you enter or leave a room or building; the space that a door can close

Examples

"he stuck his head in the doorway"

4
[ noun ] (psychology) the smallest detectable sensation

Synonyms

limen

5
[ noun ] a region marking a boundary

Synonyms

verge brink

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