Noun

(en noun)

A that ensures the door cannot be opened without the key.

* , chapter=5

, title= The Mirror and the Lamp , passage=Then everybody once more knelt, and soon the blessing was pronounced. The choir and the clergy trooped out slowly,

* {{quote-book, year=1963, author=(Margery Allingham), title=(The China Governess)

, chapter=20 citation , passage=‘No. I only opened the door a foot and put my head in. The street lamps shine into that room. I could see him. He was all right. Sleeping like a great grampus. Poor, poor chap.’}}

Any flap, etc. that opens like a door.

A non-physical into the next world, a particular feeling, a company, etc.

(computing, dated) A . See (BBS door).

Noun

(en noun)

The bottom-most part of a doorway that one crosses to enter; a sill.

(by extension) An entrance

The start of the landing area of a runway

(engineering) The quantitative point at which an action is triggered, especially a lower limit.

The wage or salary at which income tax becomes due

The outset of an action or project

The point where one mentally or physically is vulnerable in response to provocation or to particular things in general. As in emotions, stress, or pain.

The point of beginning or entry

From all the pressure my partner has been through lately, his emotion threshold has suddenly gotten pretty low these days. I can tell because he easily loses it when he is around people or hears about anything to do with his concerns.