O.E. col, from P.Gmc. *koluz, from PIE base *gel- "cold, to freeze." The v. form kele (from O.E. colian) was used by Shakespeare, but has been assimilated with the adj. into the modern word. Applied since 1728 to large sums of money to give emphasis to amount. Meaning "calmly audacious" is from 1825. Slang use for "fashionable" is 1933, originally Black English, said to have been popularized in jazz circles by tenor saxophonist Lester Young. Related: Cooling (mid-14c.); coolly (1570s).
The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D. Copyright (C) 2007 by HarperCollins Publishers. Cite This Source
cool in Technology
1. Concurrent Object-Oriented Language. 2. CLIPS Object-Oriented Language? 3. A C++ class library developed at Texas Instruments that defines containers like Vectors, List, Hash_Table, etc. It uses a shallow hierarchy with no common base class. The functionality is close to Common Lisp data structures (like libg++). The templatesyntax is very close to Cfront 3.x and g++ 2.x. JCOOL's main difference from COOL and GECOOL is that it uses real C++ templates instead of a similar syntax that is preprocessed by a special 'cpp' distributed with COOL and GECOOL. (ftp://csc.ti.com/pub/COOL.tar.Z). GECOOL, JCOOL: (ftp://cs.utexas.edu/pub/COOL/). E-mail: Van-Duc Nguyen (1992-08-05)