To fasten or secure with a deadbolt.
A kind of lock in which the bolt (moving portion) is held in position by the cylinder rather than by a spring and so cannot be retracted except by turning the cylinder.
The part of the lock which is moved when the key is engaged.
To seal or fasten with a wafer.
A thin disk of consecrated unleavened bread used in communion.
A light, thin, flat biscuit/cookie.
A soft disk originally made of flour, and later of gelatin or a similar substance, used to seal letters, attach papers etc.
A thin disk of silicon or other semiconductor on which an electronic circuit is produced.