Princeton's WordNet

1. padlock(verb)

   a detachable lock; has a hinged shackle that can be passed through the staple of a hasp or the links in a chain and then snapped shut

2. padlock(verb)

   fasten with a padlock

Kernerman English Learner's Dictionary

1. padlock(noun)ˈpædˌlɒk

   a lock with a U-shaped fastener

2. padlock(verb)ˈpædˌlɒk

   to fasten with a padlock

   to padlock the door

Wiktionary

1. padlock(Noun)

   A detachable lock that can be used to secure something by means of a sliding or hinged shackle

2. padlock(Verb)

   To lock using a padlock.

Origin: padlok, from pad-, of unknown origin, + lok

Webster Dictionary

1. Padlock(noun)

   a portable lock with a bow which is usually jointed or pivoted at one end so that it can be opened, the other end being fastened by the bolt, -- used for fastening by passing the bow through a staple over a hasp or through the links of a chain, etc

2. Padlock(noun)

   fig.: A curb; a restraint

3. Padlock(verb)

   to fasten with, or as with, a padlock; to stop; to shut; to confine as by a padlock

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