1. padlock - Noun
2. padlock - Verb
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.
Fig.: A curb; a restraint.
To fasten with, or as with, a padlock; to stop; to shut; to confine as by a padlock.
Source: Webster's dictionaryFaith is a padlock of the mind, and few keys can open it. Jerry Coyne
Blasphemy is a padlock which hypocrisy tries to put on the lips of all honest men. Robert G. Ingersoll
Be to her virtues very kind; Be to her faults a little blind; Let all her ways be unconfined; And clap your padlock - on her mind! Matthew Prior
Before placing an order on the checkout page, look for “https” preceding the domain name in the status bar (the “s” stands for secure), or a padlock icon at the bottom right of the sign-in and checkout screens. Source: Internet
Her mother eventually installs a padlock on the door to try to stop her from going out (and working under the assumption that she is going out to hear music and meet up with a boy). Source: Internet
Lauren Klassen padlock earring, $300, available at Farfetch. Source: Internet