1. (noun) the smallest detectable sensation

• limen

2. (noun) the entrance (the space in a wall) through which you enter or leave a room or building; the space that a door can close

• door
• doorway
• room access

3. (noun) 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

• doorsill
• doorstep

4. (noun) a region marking a boundary

• brink
• verge

1. (noun) the smallest detectable sensation

• absolute threshold
• difference limen
• difference threshold
• differential limen
• differential threshold

2. (noun) the entrance (the space in a wall) through which you enter or leave a room or building; the space that a door can close

• exterior door
• outside door

1. (noun) the starting point for a new state or experience

• beginning
• commencement
• first
• get-go
• kickoff
• offset
• outset
• showtime
• start
• starting time

2. (noun) the smallest detectable sensation

• aesthesis
• esthesis
• sensation
• sense datum
• sense experience
• sense impression

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

• entrance
• entranceway
• entree
• entry
• entryway

4. (noun) 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

• sill

5. (noun) a region marking a boundary

• bound
• boundary
• edge

1. (noun) a region marking a boundary

• verge