Threshold

n. doorstep, doorway, entrance; brink, verge, beginning

Threshold may refer to: In fiction:Threshold (Doctor Who), organization of Gallifreyan/Human origin in Doctor Who comic stripsThreshold (fictional planet), the planet around which the ringworld Halo orbits in the video game HaloThreshold (comics), comic book character from WildstormThreshold (novel), a 1985 science fiction novel by David R. PalmerThreshold, a 2001 science fiction novel by Caitlín R. KiernanThreshold (TV series)The Threshold Project, a plot element from Sierra's PC game Phantasmagoria 2: A Puzzle of Flesh
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Noun
1. the starting point for a new state or experience; "on the threshold of manhood"
(hypernym) beginning, commencement, first, outset, get-go, start, kickoff, starting time, showtime, offset
2. the smallest detectable sensation
(synonym) limen
(hypernym) sensation, sense experience, sense impression, sense datum
(hyponym) absolute threshold
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"
(synonym) doorway, door, room access
(hypernym) entrance, entranceway, entryway, entry, entree
(hyponym) exterior door, outside door
(part-holonym) wall
(part-meronym) casing, case
4. 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
(synonym) doorsill, doorstep
(hypernym) sill
(part-holonym) doorway, door, room access
5. a region marking a boundary
(synonym) brink, verge
(hypernym) boundary, edge, bound

(n.)
The plank, stone, or piece of timber, which lies under a door, especially of a dwelling house, church, temple, or the like; the doorsill; hence, entrance; gate; door.
  

(n.)
Fig.: The place or point of entering or beginning, entrance; outset; as, the threshold of life.
  

1. The minimum value of a signal that can be detected by the system or sensor under consideration. (188 ) 2. A value used to denote predetermined levels, such as those pertaining to volume of message storage, i.e., in-transit storage or queue storage, used in a message switching center. (188 ) 3. The minimum value of the parameter used to activate a device. (188 ) 4. The minimum value a stimulus may have to create a desired effect.