lock(redirected from has a lock on)
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1. a place, often airtight, where something is sealed in.
2. a device such as a clamp for holding something firmly in place.
heparin lock see heparin lock.
A device for holding or closing.
lockVox populi A device that prevents a particular action or activity. See Bloxham air lock, Heparin lock, Job lock, Vapor lock.
1. An enclosing, fastening, or securing device.
2. A mechanism that, when moved, permits or obstructs passage.