| 1. | a movable, usually solid, barrier for opening and closing an entranceway, cupboard, cabinet, or the like, commonly turning on hinges or sliding in grooves. |
| 2. | a doorway: to go through the door. |
| 3. | the building, house, etc., to which a door belongs: My friend lives two doors down the street. |
| 4. | any means of approach, admittance, or access: the doors to learning. |
| 5. | any gateway marking an entrance or exit from one place or state to another: at heaven's door. |
| 6. | lay at someone's door, to hold someone accountable for; blame; impute. |
| 7. | leave the door open, to allow the possibility of accommodation or change; be open to reconsideration: The boss rejected our idea but left the door open for discussing it again next year. |
| 8. | lie at someone's door, to be the responsibility of; be imputable to: One's mistakes often lie at one's own door. |
| 9. | show someone the door, to request or order someone to leave; dismiss: She resented his remark and showed him the door. |

"A door is what a dog is perpetually on the wrong side of." [Ogden Nash]First record of dooryard is c.1764, Amer.Eng.; doorstep is from 1810.
Doors
moved on pivots of wood fastened in sockets above and below (Prov. 26:14). They were fastened by a lock (Judg. 3:23, 25; Cant. 5:5) or by a bar (Judg. 16:3; Job 38:10). In the interior of Oriental houses, curtains were frequently used instead of doors. The entrances of the tabernacle had curtains (Ex. 26:31-33, 36). The "valley of Achor" is called a "door of hope," because immediately after the execution of Achan the Lord said to Joshua, "Fear not," and from that time Joshua went forward in a career of uninterrupted conquest. Paul speaks of a "door opened" for the spread of the gospel (1 Cor. 16:9; 2 Cor. 2:12; Col. 4:3). Our Lord says of himself, "I am the door" (John 10:9). John (Rev. 4:1) speaks of a "door opened in heaven."