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
2. To detect or perceive, as if by the sense of smell; to
scent out; -- often with out. "I smell a device." --Shak.
Can you smell him out by that? --Shak.
3. To give heed to. [Obs.]
From that time forward I began to smellthe Word of
God, and forsook the school doctors. --Latimer.
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.]