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Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Mathematics The symbol (+), as in 2 + 2 = 4, that is used to indicate addition or a positive quantity.
  • n. Chemistry The same symbol, used to indicate dextrorotatory rotation of polarized light.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The symbol + used to denote the operation of addition and to indicate that a number is positive.

from the GNU version of the Collaborative International Dictionary of English

  • adj. the sign (+) which denotes addition, or a positive quantity.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a sign indicating the operation of addition

Etymologies

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