1. an unsecured and unregistered short-term obligation issued by an institutional borrower to investors who have temporarily idle cash;
The Collaborative International Dictionary of English v.0.48:
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."
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.
WordNet (r) 3.0 (2006):
n 1: an unsecured and unregistered short-term obligation issued
by an institutional borrower to investors who have
temporarily idle cash