From WordNet (r) 3.0 (2006) [wn]:
commercial
adj 1: connected with or engaged in or sponsored by or used in
commerce or commercial enterprises; "commercial trucker";
"commercial TV"; "commercial diamonds" [ant:
noncommercial]
2: of or relating to commercialism; "a commercial attache";
"commercial paper"; "commercial law"
3: of the kind or quality used in commerce; average or inferior;
"commercial grade of beef"; "commercial oxalic acid" [syn:
commercial, commercial-grade]
n 1: a commercially sponsored ad on radio or television [syn:
commercial, commercial message]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Commercial \Com*mer"cial\, a. [Cf. F. commercial.]
Of or pertaining to commerce; carrying on or occupied with
commerce or trade; mercantile; as, commercial advantages;
commercial relations. "Princely commercial houses."
--Macaulay.
[1913 Webster]
Commercial college, a school for giving instruction in
commercial knowledge and business.
Commercial law. See under Law.
Commercial note paper, a small size of writing paper,
usually about 5 by 71/2 or 8 inches.
Commercial paper, negotiable paper given in due course of
business. It includes bills of exchange, promissory notes,
bank checks, etc.
Commercial traveler, an agent of a wholesale house who
travels from town to town to solicit orders.
Syn: See Mercantile.
[1913 Webster]