commercial (adj.)

1680s, "engaging in trade," from commerce + -al (1). Meaning "done for the sake of financial profit" (of art, etc.), "prepared for the market or as an article of trade" is from 1871. Meaning "paid for by advertisements" (in reference to radio, TV, etc.) is from 1932. Related: Commercially.

commercial (n.)

"an advertisement broadcast on radio or TV," 1935, from commercial (adj.). Earlier as a noun it was short for commercial traveler (1855).

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Definitions of commercial from WordNet
commercial (adj.)
connected with or engaged in or sponsored by or used in commerce or commercial enterprises;
commercial TV
commercial trucker
commercial diamonds
commercial (adj.)
of or relating to commercialism;
commercial paper
a commercial attache
commercial law
commercial (adj.)
of the kind or quality used in commerce; average or inferior;
commercial oxalic acid
commercial grade of beef
Synonyms: commercial-grade
commercial (n.)
a commercially sponsored ad on radio or television;
Synonyms: commercial message