smoke

noun

1.
a cloud of fine particles suspended in a gas
Derived from:
smoke smoky
2.
a hot vapor containing fine particles of carbon being produced by combustion
Derived from:
smoke smoky
3.
an indication of some hidden activity
4.
something with no concrete substance
7.
the act of smoking tobacco or other substances
Derived from:
smoke
8.
(baseball) a pitch thrown with maximum velocity