"padlock" in the noun sense
1. padlock
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
"padlock" in the verb sense
1. padlock
fasten with a padlock
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License