WordReference Random House Unabridged Dictionary of American English © 2026
plus′ sign′, [Arith.]
  1. Mathematicsthe symbol (+) indicating summation or a positive quality.
  • 1645–55

Collins Concise English Dictionary © HarperCollins Publishers::
plus sign
  1. the symbol +, indicating addition or positive quantity
'plus sign' also found in these entries (note: many are not synonyms or translations):
ion - plus - sign - signed number

Forum discussions with the word(s) "plus sign" in the title:


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