The Collaborative International Dictionary of English v.0.48:

Snarl \Snarl\, v. t. [From Snare, v. t.]
   1. To entangle; to complicate; to involve in knots; as, to
      snarl a skein of thread. "Her snarled hair." --Spenser.
      [1913 Webster]

   2. To embarrass; to insnare.
      [1913 Webster]

            [The] question that they would have snarled him
            with.                                 --Latimer.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Snarl \Snarl\, n.
   A knot or complication of hair, thread, or the like,
   difficult to disentangle; entanglement; hence, intricate
   complication; embarrassing difficulty.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Snarl \Snarl\, v. i. [From Snar.]
   1. To growl, as an angry or surly dog; to gnarl; to utter
      grumbling sounds. "An angry cur snarls while he feeds."
      --Dryden & Lee.
      [1913 Webster]

   2. To speak crossly; to talk in rude, surly terms.
      [1913 Webster]

            It is malicious and unmanly to snarl at the little
            lapses of a pen, from which Virgil himself stands
            not exempted.                         --Dryden.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Snarl \Snarl\, n.
   The act of snarling; a growl; a surly or peevish expression;
   an angry contention.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Snarl \Snarl\, v. t. [imp. & p. p. Snarled; p. pr. & vvb. n.
   Snarling.] [Etymol. uncertain.]
   To form raised work upon the outer surface of (thin metal
   ware) by the repercussion of a snarling iron upon the inner
   surface.
   [1913 Webster]

WordNet (r) 3.0 (2006):

snarl
    n 1: a vicious angry growl
    2: an angry vicious expression
    3: something jumbled or confused; "a tangle of government
       regulations" [syn: tangle, snarl, maze]
    v 1: utter in an angry, sharp, or abrupt tone; "The sales clerk
         snapped a reply at the angry customer"; "The guard snarled
         at us" [syn: snap, snarl]
    2: make a snarling noise or move with a snarling noise; "Bullets
       snarled past us"
    3: twist together or entwine into a confusing mass; "The child
       entangled the cord" [syn: entangle, tangle, mat,
       snarl] [ant: disentangle, straighten out, unsnarl]
    4: make more complicated or confused through entanglements [syn:
       snarl, snarl up, embrangle]