The Collaborative International Dictionary of English v.0.48:

Smell \Smell\, v. i.
   1. To affect the olfactory nerves; to have an odor or scent;
      -- often followed by of; as, to smell of smoke, or of
      musk.
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   2. To have a particular tincture or smack of any quality; to
      savor; as, a report smells of calumny.
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            Praises in an enemy are superfluous, or smell of
            craft.                                --Milton.
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   3. To exercise the sense of smell. --Ex. xxx. 38.
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   4. To exercise sagacity. --Shak.
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The Collaborative International Dictionary of English v.0.48:

Smell \Smell\ (sm[e^]l), v. t. [imp. & p. p. Smelled, Smelt;
   p. pr. & vb. n. Smelling.] [OE. smellen, smillen, smullen;
   cf. LG. smellen, smelen, sm["o]len, schmelen, to smoke, to
   reek, D. smeulen to smolder, and E. smolder. Cf. Smell, n.]
   1. To perceive by the olfactory nerves, or organs of smell;
      to have a sensation of, excited through the nasal organs
      when affected by the appropriate materials or qualities;
      to obtain the scent of; as, to smell a rose; to smell
      perfumes.
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   2. To detect or perceive, as if by the sense of smell; to
      scent out; -- often with out. "I smell a device." --Shak.
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            Can you smell him out by that?        --Shak.
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   3. To give heed to. [Obs.]
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            From that time forward I began to smellthe Word of
            God, and forsook the school doctors.  --Latimer.
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   To smell a rat, to have a sense of something wrong, not
      clearly evident; to have reason for suspicion. [Colloq.]


   To smell out, to find out by sagacity. [Colloq.]
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The Collaborative International Dictionary of English v.0.48:

Smell \Smell\, n. [OE. smel, smil, smul, smeol. See Smell, v.
   t.] (Physiol.)
   1. The sense or faculty by which certain qualities of bodies
      are perceived through the instrumentally of the olfactory
      nerves. See Sense.
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   2. The quality of any thing or substance, or emanation
      therefrom, which affects the olfactory organs; odor;
      scent; fragrance; perfume; as, the smell of mint.
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            Breathing the smell of field and grove. --Milton.
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            That which, above all others, yields the sweetest
            smell in the air, is the violent.     --Bacon.
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   Syn: Scent; odor; perfume; fragrance.
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WordNet (r) 3.0 (2006):

smell
    n 1: the sensation that results when olfactory receptors in the
         nose are stimulated by particular chemicals in gaseous
         form; "she loved the smell of roses" [syn: smell, odor,
         odour, olfactory sensation, olfactory perception]
    2: any property detected by the olfactory system [syn:
       olfactory property, smell, aroma, odor, odour,
       scent]
    3: the general atmosphere of a place or situation and the effect
       that it has on people; "the feel of the city excited him"; "a
       clergyman improved the tone of the meeting"; "it had the
       smell of treason" [syn: spirit, tone, feel, feeling,
       flavor, flavour, look, smell]
    4: the faculty that enables us to distinguish scents [syn:
       smell, sense of smell, olfaction, olfactory modality]
    5: the act of perceiving the odor of something [syn: smell,
       smelling]
    v 1: inhale the odor of; perceive by the olfactory sense
    2: emit an odor; "The soup smells good"
    3: smell bad; "He rarely washes, and he smells"
    4: have an element suggestive (of something); "his speeches
       smacked of racism"; "this passage smells of plagiarism" [syn:
       smack, reek, smell]
    5: become aware of not through the senses but instinctively; "I
       sense his hostility"; "i smell trouble"; "smell out
       corruption" [syn: smell, smell out, sense]