The Collaborative International Dictionary of English v.0.48:

Snug \Snug\, n. (Mach.)
   Same as Lug, n., 3.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Snug \Snug\, v. i. [imp. & p. p. Snugged; p. pr. & vb. n.
   Snugging.]
   To lie close; to snuggle; to snudge; -- often with up, or
   together; as, a child snugs up to its mother.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Snug \Snug\, v. t.
   1. To place snugly. [R.] --Goldsmith.
      [1913 Webster]

   2. To rub, as twine or rope, so as to make it smooth and
      improve the finish.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Snug \Snug\, a. [Compar. Snugger; superl. Snuggest.] [Prov.
   E. snug tight, handsome; cf. Icel. sn["o]ggr smooth, ODan.
   sn["o]g neat, Sw. snugg.]
   1. Close and warm; as, an infant lies snug.
      [1913 Webster]

   2. Close; concealed; not exposed to notice.
      [1913 Webster]

            Lie snug, and hear what critics say.  --Swift.
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   3. Compact, convenient, and comfortable; as, a snug farm,
      house, or property.
      [1913 Webster]

WordNet (r) 3.0 (2006):

snug
    adj 1: offering safety; well protected or concealed; "a snug
           harbor"; "a snug hideout"
    2: fitting closely but comfortably; "a close fit" [syn: close,
       snug, close-fitting]
    3: well and tightly constructed; "a snug house"; "a snug little
       sailboat"
    4: enjoying or affording comforting warmth and shelter
       especially in a small space; "a cozy nook near the fire";
       "snug in bed"; "a snug little apartment" [syn: cozy,
       cosy, snug]
    n 1: a small secluded room [syn: cubby, cubbyhole,
         snuggery, snug]