from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A spring lock that can be opened from the inside by turning a knob but from the outside only with a key.
from the GNU version of the Collaborative International Dictionary of English
- n. a kind of latch for a door, which is operated from the outside by a key.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. doorlock operated by a knob on the inside and a key on the outside
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