a small chain for securing a door to a doorjamb to prevent intrusion
Traditional door chains are completely unable to withstand more than two or threekicks from a would-be intruder.
door chain in Hospitality
(dɔr tʃeɪn)
Word forms: (regular plural) door chains
noun
(Hospitality (hotel): Hotel room, bedroom)
A door chain is a small chain, attached to the inside of a door, which you can attach to the frame of the door to cover the opening for extra security.
Use the door chain when opening your door.
When they went to bed they put the door chain across the room door.
The door chain allows you to open your door part way while it stays secure.