C++ (s??pl?s?pl?s?)n. A widely used object-oriented programming language based on C.[From ++, name of an operator in the language, and from the use of the plus sign to indicate enhancement.]American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.C, c (si) n., pl. Cs C’s, cs c’s for 1-4. 1. the third letter of the English alphabet, a consonant. 2. any spoken sound represented by this letter. 3. something shaped like a C. 4. a written or printed representation of the letter C or c. C 1. Gram. complement. 2. consonant. 3. coulomb. 4. county (used with a number to designate a county road): C55. C Symbol. 1. the third in order or in a series. 2. (sometimes l.c.) (in some grading systems) a grade or mark indicating fair or average quality. 3. a. the tonic note of the C major scale. b. a tonality having C as the tonic. c. a written or printed note representing this tone. d. (in the fixed system of solmization) the first tone of the scale of C major, called do. e. the tonality having C as the tonic note. f. a symbol indicating quadruple time and appearing after the clef sign on a musical staff. 4. (sometimes l.c.) the Roman numeral for 100. 5. a powerful high-level computer programming language suitable for creating operating systems and complex applications. 6. Celsius. 7. centigrade. 8. capacitance. 9. carbon. 10. a. cysteine. b. cytosine. 11. Also, C-note. Slang. a hundred-dollar bill. c 1. Optics. candle. 2. (with a year) about: c1775. [