NOUN (1)

1. 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;


VERB (1)

1. fasten with a padlock;

The Collaborative International Dictionary of English v.0.48:

Padlock \Pad"lock`\, n. [Perh. orig., a lock for a pad gate, or
   a gate opening to a path, or perh., a lock for a basket or
   pannier, and from Prov. E. pad a pannier. Cf. Pad a path,
   Paddler.]
   1. 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.
      [1913 Webster]

   2. Fig.: A curb; a restraint.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Padlock \Pad"lock`\, v. t. [imp. & p. p. Padlocked; p. pr. &
   vb. n. Padlocking.]
   To fasten with, or as with, a padlock; to stop; to shut; to
   confine as by a padlock. --Milton. Tennyson.
   [1913 Webster]

WordNet (r) 3.0 (2006):

padlock
    n 1: 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
    v 1: fasten with a padlock

Moby Thesaurus II by Grady Ward, 1.0:

41 Moby Thesaurus words for "padlock":
   bang, bar, barricade, barrier, batten, batten down, bolt, button,
   button up, choke, choke off, clap, close, close up, constrict,
   contain, contract, cover, fasten, fold, fold up, key, latch, lock,
   lock out, lock up, occlude, plumb, seal, seal off, seal up, secure,
   shut, shut the door, shut up, slam, snap, squeeze shut, strangle,
   zip up, zipper