| NOUN | artifact | doorknocker, knocker, rapper | a device (usually metal and ornamental) attached by a hinge to a door |
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| Meaning | A device (usually metal and ornamental) attached by a hinge to a door. | |
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| Synonyms | knocker, rapper | |
| Part of | front door, front entrance | exterior door (at the entrance) at the front of a building |
| Broader | device | An instrumentality invented for a particular purpose |